Oh, I don't think it's an actual problem. Giving players an extra Feat, esp. if there are any limits on it, at level 1, doesn't massively impact balance, and the Gifts aren't much more extreme and allow more customization, which is a major bonus. But denying that power creep is even happening is just unhelpful.
I doubt it. If there isn't a 6E or something very like it in 2024 I'll be shocked. And your entire understanding of the Psionics issue wrong. They tried to get Psionics out relatively quickly, but they applied an idiotic test to it that any full-caster class would have certainly failed, and then all the attempts thereafter have been half-hearted and confused, and not the result of "years of internal playtesting". Psionics was certainly intended to be out by late 2017 or early 2018 though. Also it's a terrible measure for edition length. 3E got Psionics out 2001, even earlier than 4E. 2E got them out in 1991, only two years after release. In every edition after 1E, D&D has tried to get out Psionics in pretty quickly. This includes 5E. 5E is just the one they failed at due to what was, frankly, their own stupidity/perversity, when they were taking an entirely different and vastly more cautious approach to 5E, one I would argue was significantly less successful than the more recent approach at moving books and keeping people happy and excited for new product.
On the other hand I think that whatever form 6E takes it is likely to be heavily backwards-compatible with 5E, to the point where some people will claim it's "just 5.5E" even when that is manifestly false. It almost certainly won't be called 6E by WotC.