ORIGINAL: Osito
Regarding Stellaris, the change has not yet been implemented, but it will still be possible to run an older version with warp. Regardless of that personally, I've returned to DW:U already.
Yes, me too. Stellaris still has enormous problems, particularly with warfare (where DW always effortlessly outclassed it) but their "solution" to gut all the asymmetric FTL methods down to only starlanes of all things is just not acceptable for me. I didn't buy a starlane-based game from Paradox and I wont be playing one in the future. Sticking with 1.8.3 is really not acceptable either because there will still be a huge plethora of never-fixed bugs, existing mods will no longer be updated and new mods will be useless.
Stellaris still does a couple of things clearly better than DW...
1/ Race customization and diversity. No doubt about it, still by far the king in this area.
2/ Exploration and the resulting missions and side-quests.
A week ago I would have also added FTL diversity to that list too but now that its being scrapped because they cant seem to think of any other way to solve their (admittedly huge) gameplay problems other than to completely rip out one of their most iconic and unique core features, DW is looking far more attractive again and I've already started another game.