So far I've seen complete 1, win 1 and win 3.  The wild variance here is mind boggling. 

Does it count as "completing" if you quit during champ selection? Still consumes a token.

oui

I have few propositions how to make this game better in coming years.I think you should stop expanding grinding in game,even now is a bit too much. Instead of that,work on game depth and quality. For example live Arena can be remade to be in 3d(or 2d like a chess board) and magic cards added. That way Arena will become much more interesting to play, not like now which is pay-to-win 95% and 5% skill. Also spamming players with fusions and events every few days can get boring fast. This direction of game can attract much new players as well. Thanks in advance for your time.

Did they double arena tier sizes again?

they did not. silver tiers all got a 1.5x increase, while gold increased by a varying amount for each tier (the tier you care about got the smallest increase, from 2.5→3k).

Thank you. Every little bit helps i guess. 

Do you know the total increase to G1 and to Gold as a whole?

All Gold Tiers combined now hold 25k players, which is definitely more, but still seems too low considering how many players have been locked out of Ramantu for so long.  

G1: 7k→10k

G2: 4.5k→7k

G3: 3k→5k

G4: 2.5k→3k

So, 8K more total spots in Gold 3v3 is all Plarium thinks is needed to put the oomph back into Ramantu Missions? Somehow, I doubt it.