No upgrade from Groove Agent SE 5 from cubase 10


New to cubase 10 Artist (and tired of waiting for an upgrade offer to Pro, so…), I discovered Groove Agent SE 5 packed with the DAW. Very nice but missing some beats I am looking for.
Then I see the Groove Agernt 5 full version with some more features.
So I have some questions :

  1. Is it an interesting upgrade ? Or should I stay with SE version ?
  2. I don’t see any upgrade from Groove Agent SE 5, this mean that I have to pay for full product ? Seems not fair ?