"Sir, this is a Wendy's."
If you want really fancy stuff and a game that no longer bares any resemblance to the original game that earned a fanbase, you might be better served with mods. That's what mods are for. If the game loses its balance of RTS elements relative to 4X elements and becomes "Sins of Stellaris" then people might just simply purchase Stellaris and avoid this title.
i kinda disagree. Now i dont want the game to go full stellaris, its sins i like. But saying things like no longer bearing resemblance to original is heavy hyperbole. I dont think thats what OP is asking for.
As far as balance between RTS and 4x goes, i think its undeniable that authors tried already with Rebellion to make the “exploration” part of the game deeper - hence stellar phenomena, additional planet types, minor factions… and stuff like mad titan. Unfortunately they were rather resource limited due to 32bit nature of said game, so it was all bit meh, could not really add anything more interesting and exciting, as they were out of place for new content.
Now that should not be a problem anymore and if there is one thing that Stellaris does better than Sins, its all the alien stuff you can encounter, all those event chains and contingencies, exciting stuff to be found and excavated, all the fallen empires and broken ring worlds, wormholes that lead somewhere… every new system you visit has possibility to spice up your game and take it to unexpected direction. i believe this is good, since Sins, like Stellaris, has the same sandboxey gameplay with role playing aspect and building up on that would make the game even better.
Other notable game is Infinite space: Sea of Stars 3 - while not really an rts, more like turn based RPG with realtime combat, it has that aspect, where you go from system to system and find various technologies or other precious stuff, that you can either use or trade in, or it does open one of the games quests/events. When you for example manage to lay hands on powerful weapon like Particle Vortex Cannon and then mount it on your ship, making it significantly powerful - its always uberawesome and exciting. Imagine this transformed to RTS gameplay of Sins, that retrieving some cool alien weapon be it via trade/diplomacy or archaelogy would give you new powerful weapon to researched and fetrofitted on your ships - imo it sounds great.