Is SP as good as it's gonna get or have they discussed possibly improving SP in updates to come?
as good as it's gonna get, it's a pure copy of the multiplayer but not requiring other people and an internet connection.
It is a bit like Titanfall in that it has a SP mode that is the MP mode with bots and that is it. In my opinion that does not translate into having an actual singleplayer, but hey, it ticks of another box.
If they say they offer SP. Then they should actually offer proper SP. I already had talks with the lovely titanfall creators about it. After one of their statements. No one wants to play single player anymore.
So if you supply SP then do the work not just use MP and add bots. Oh and btw the Story in TF actually sucks to!