On the other hand, they have several things going for them: they have excellent timing (per Doris), good work ethics, partnering skills and togetherness (per Colleen), and a top-notch coaching team who could tailor programs to get around sibling issues .
Timing between a brother & sister team tends to be an advantage because they know each other forever, especially when they are paired young. As for work ethics, that's a requirement of all top teams, so not an edge per say. Whether they are a well matched team, visually, I don't think so - for instance, their heights. Alex also looks younger than 19. Paul Poirier is of same age, but if you put the two guys side by side, Paul looks at least 3-4 years older than Alex. The maturity of the male partner in an Ice Dance couple is very important because the man has to be able to lead and accentuate the beauty of the woman in many of the more traditional dances, e.g. tango and paso doble. Someone hinted at Victor Kraatz being a mismatch to Shae-Lynn Bourne, without naming Victor in this thread - that has always been his nemesis and one of the reason why they were thought to be unable to do dramatic type of dances because he is not seen as "aggressive" enough. For a better part of their career, it was an important limitation for them and a label they worked very hard to get rid of. In my opinion, Alex Shibutani and to a lesser extent, Charlie White, have similar issues as well. But I think for Alex, this problem will be more pronounced, especially if he is unable to step up in next few years.
2) Let's face it - they are only 16 & 19. And Asians in general look younger than Caucasians. Remedy - give them time to mature!
My wish lists: For Maia to drink gallons and gallons of milk this Summer so she grows taller again the next season

; for Alex to grow and mature enough that I can see his "five o'clock shadow'' at least once!
This is an area that time should help them. They both need more maturity. But more than just age, it's also the chemistry that they create. I think the challenge will be greater for Alex than it is for Maia.
3) Beauty is in the eye of the beholder - I personally think they are plenty attractive. Beyond physical attributes though, they have very appealing qualities - be it the sheer joy in their dancing expression, precise and quiet skating contributing to their trademark old-fashioned elegance, and beautifully matching leg lines and serene unison, which are, perhaps, only siblings can achieve.
I think you misunderstood me. When I said they are not good looking enough for Ice Dance, I wasn't expressing an opinion based solely on my personal preference. That kind of personal preference is not very relevant. Conversely, I could find an X Ice Dance team who is not my type but yet recognize that they are well matched for each other and objectively, handsome team based on their symmetry and physical attributes that complement each other. The qualities you describe are valid, however, you will also notice they are fairly narrow in style. How do you think they will do in a Paso Doble for example or Argentine Tango? Many of the qualities you mentioned above would encounter severe limitations and their weaknesses in style will be very evident in these types of dance. By not good looking enough, part of it is my opinion that they are not yet mature enough compared to some of the other top teams, mostly based on how they project to the audience but part of it is the lack of versatility and of course, part of it has to be my own subjective perception as well even though I try to minimize that and be as objective as possible.
The good news is Point #3 could change. Some people are really not attractive when they were young, but as they mature, they become very different, this is not uncommon.
One interesting aspect of the Shibs having Japanese heritage - I'm not surprised that some judges (out of being "PC") may root for them, thereby ensuring at least one "non-Caucasian team" among top ten. I personally think that kind of motive is an insult to this very hard working and talented team, and they certainly is the first-tier team solely on their own merit, but their is no accounting for some judges motives.

Well, I can assure you this is not a real consideration in Ice Dance. If being PC has been a consideration, we would have seen teams from China and/or Japan in Top 10 already by now. After all, if the Chinese can win Olympic Gold and several World Championships in Pairs, there is no reason they can't be in the Top 10 in Ice Dance but they haven't. Having Japanese heritage will not make some judges rooting for them or against them, I don't understand where you get that idea - not even if there is a Korean judge on the panel. See, politics in Ice Dance happen at a high level, usually beyond such details as the race of the skaters. In other words, heritage is not a consideration but the country you represent is. So can the Shibs expect more favorable treatment from even the Japanese judge? Hard to say, maybe yes, maybe not, only because Japan is traditionally a fairly neutral country when it comes to Ice Dance - it's not something they lose any sleep over. If it's hard to even predict how the Japanese judge will react, it's even harder to predict what others might think, so it's pointless to speculate in that front.