It's a flaw no doubt. To me the tech is more like a barrier to higher PCS not that you will defo get it. Like Aliona will need to show 3As to get access to higher PCS.
Same way we see how Kolyada/Jason gets around 90 PCS but cannot access Yuzu/Nathan level without the extra tech.
It's not that simple as linking it to TES. I think you just don't understand how PCS works
in practice. Forget about PCS categories - for judges they means almost nothing. If that wasn't the case - the difference between them would be much higher. While TES indeed works like it was designed for modern system - PCS works exactly like it was in 6.0 system. Main factors playing role here:
1) number of flight/skate. The first skater in the first flight will always get relatively low PCS - just because judges are not sure how much the next skaters can be better and they need to leave place for them in PCS. Exactly like it was in 6.0. See Sinitsyna's PCS as example. In second flight and higher skaters tends to get automatically higher PCS despite their actual performance.
2) difference between skaters just skated before and skated just now on the scale of the whole strength level (by strength I mean not only presentation and confidence - but cleanliness, TES level and number of tech calls). If judges can see that the skater was much better than previous one - they would give them much higher PCS. But not very high if there can be even stronger skaters ahead. If the skater was worse - they determine between which skaters he should be based on their previous notes about their own impressions of previous skaters.
3) level of crowd support. Applauses affects judges very noticeably. It's one of the reasons local skaters are usually getting much higher PCS even from international judges.
4) fame, reputation, federation support, age. It's far from being major factor though - despite how many people are trying to set such narration.
All it means that PCS score is completely
relative to skaters on current competition and there is zero sense in trying to compare scores between competitions. What matters is not scores - but places. Scores is just a tool to place skaters - nothing more. It means Valieva's PCS were relative to Tuktamysheva's PCS. Since judges decided to support Liza's quite slow skating very much (giving her 70+ PCS) - given how local crowd loves her - Kamila just after Liza's skate looked like goddess of transitions/skating skills (even if she wasn't). If we add here sky-high TES and impressive quads - judges were just forced to show her very
big difference in level of strength between Tuktamysheva and Valieva. Giving Kamila only 2 or 3 point of difference in PCS would look like a joke. So we have 76 PCS. If Tuktamysheva were given 66 PCS - Kamila would get 72.
It means that in different competition (for example in GPF) with rivals more close to Valieva's level - she would get lower PCS. Because judges would make place for her close rivals there. If you don't believe in my theory - try to analyze past competitions PCS scores with that in mind. It's very important to remember though - you can't analyze skaters randomly chosen. To understand PCS scores -
one must watch skaters in exact order they skated one after another. It's that important. And you will see that many PCS anomalies are actually becoming clear (for example Satoko's PCS underscoring etc.).
Given the above all that infinite complains about Eteri's skaters overscoring makes me just smile tiredly. If you don't like it - make other skaters to show the same TES content more or less cleanly. It will be the first step to get the same scores as Eteri's skaters for any nonRussian skater as well. You can say that PCS is TES-related in a sense - but as you can see it's much more complex too.