I think a little video in some of the biggest events would be good.
Thunderous applause for becoming the galactic emperor
The construction of machines as you synth ascend
The bubbling of clone vats for bio
Breaking through the shroud
etc
That would certainly help, if various clips were shown in order based on your empire's major accomplishments. I'd consider things like complete destruction of other empires, and megastructure completions to add to the list.
Really though, we do need clips for various victories...and to have various victories at all. It's a step in the right direction to have an option to nuke the whole galaxy rather than wait for the end date, but I really think there should be specific victory options to toggle on/off from the game start menu, such as:
- Crisis Defeat (on by default; game ends when the crisis is defeated, and those who do a lot to the crisis or kill it receive much higher scores than usual for doing so)
- Galactic Unification (off by default; game ends when all empires are part of the same federation and not facing any enemy force, and the president gains bonus score on game end)
- Tech Tree Completion (off by default; any non-FE/AE that has only repeatables left immediately wins)
Essentially, with all three checked, there'd be five ways to win the game, but of course, Tech Tree Completion would almost always come first (hence why it'd be a bad one to rely on...it'd mainly be for short games where you just don't want to do repeatables and waiting on the Crisis). Having Crisis Defeat and Galactic Unification both on would be interesting in that if you unify everyone fast, you could end the game pre-Crisis, but if you're too slow, then suddenly the Unbidden are forcing you to fight.
Also, these might be possible with modding, since there's a modding thing now to win the game (probably because the Aetherophasic Engine uses it).