What if every suit were trump, and partners hated each other?
The play would be a lot less strategic than at Spades, because it won't be possible to draw trump, and it certainly won't be possible to draw trump and then run a side suit.  This is one major consideration of play that would be lost.

Indeed, you would never lead your trump suit unless forced to, because that burns your trump but not other players' trump.

I'm also afraid that the game would never end if no one wanted to lose.  If a player is close to winning, it's quite easy to make sure that they end up in a 13 contract - when the player is 3rd or 4th to bid, the first two players bid 1 in the same color; when the player is 1st or 2nd to bid, some sacrificial lamb bids 13 in the other suit of their color.