I actually like the 100%. It is compatible with the whole philosophy of the IJS, which says: you get 3.30 base valuie points for doing a double Axel. Period. If you do a solo double Axel you get 3.30 points. If you do 2A+3T you get 3.30 points for the 2A. If you do 3Lz+2A+2A you get 3.30 points for the first 2A and 3.30 points for the second.
True, some double Axels are more difficult than others. A solo 2A with intricate preceding steps is more difficult than a solo 2A without intricate preceding steps. This is rewarded elsewhere (GOE, Composition, Skating Skills), but the base value is still that good old 3.30.
As for the Russian Ladies effect, it's just common sense. If you take away the best jumpers then who is left are the second-best jumpers. Maybe one day we will decide to beat our swords into plowshares and our spears inbto pruning hooks so that sporting events can return to bornal.
I think the problem with this is the difficulty of doing combinations, or at least some of them.
For example you'll often get people mentioning the difficulty of 3Lz-3Lo combinations and why people don't do them.
For example if you've got 2 skaters, one doing a 3Lz-3T and solo 3Lo, and the other doing a 3Lz-3Lo and solo 3T, then the base value is exactly same, but from the number of skaters doing the former, but not the latter it must be much harder to do the 3Lz-3Lo combination than the 3Lz-3T one, and the ease of doing the 3T doesn't make up for the difficulty of doing the 3Lo - I would also add at this point that's there's a GOE boost for the first set of jumps in that the GOE for a combination is based on the highest value jump in the combination, hence the max for the 3Lz-3T is identical to that for the 3Lz-3Lo, but then the first skater can get more for the 3Lo (up to 0.35 points) than the second one can for the 3T. So there's even further incentive to do the 3Lz-3T rather than the 3Lz-3Lo.
When it comes down to the +2A sequences I think the reason why they've become so common is that the skater gets a chance to steady themselves a bit after the first jump in the sequence so the relative ease goes down compared with doing the 2nd/3rd jumps of a combination straight away, but the reward in terms of base value is exactly the same, hence why skaters are doing it.
Solution, or at least my proposed one - increase the base value for the 2nd and 3rd jumps performed in combination (but not the first one, it's no different as far as the skater is concerned compared with a solo jump of the same type, though of course there is the increased stress of knowing there's a big combination coming up rather than a solo jump). While for sequences reduce the base value of the jump done in sequence, but yet again not the first one, why should this be reduced when you think about it.
Such a thing would reward harder combinations more, punish easier sequences, but not too much, plus also go some way to reducing the GOE advantage of doing lower value jumps, e.g. 2A's and -3T's compared with -3Lo's, in sequence/combination. For example in the Ava Marie Ziegler layout quoted by Rebecca Moose above, Ava does 7 jumping passes each of which has its GOE based on a triple because her 2As are hidden away in her 3Lz+2A+2A sequence. Hence her Base Value for GOE purposes goes up by 2 or 3 points (I'd have to check the exact figure) compared with some one who say does 5 jumping passes led off with a triple and 2 solo 2As.