I would agree but the jump from 30s to 120s is pretty huge. It makes players less likely to even want to play arena because its a huge waste of time.
So to prevent their experiment from flopping, they are making the reason for boosts less palatable for players.
Speed opening arena incs is the realm of the PTP peeps. Assuming they can get a win. By extending the wait time, the PTP peeps will just continue but slower but the FTP and casual players will get annoyed. Waiting 2 mins to get AI or meeting more players who kick your behind so hard you wear it as a hat is what is killing the game.
I dun feel motivated to go arena anymore because its boring to wait 2 mins (if lucky) to fight AI then win. Occasionally meet a human who beats me or I beat them and someone gets to stare at the loading screen for a few mins again.
You are right. The game is ending. Only those whk have hours to waste staring at the loading screen will stay.