Flaw, a huge star count.
Flaw, you have to choose between two great 4* in Junkz and in All Stars
Flaw, you have to choose which underpowered 5*s to play
Flaw, you would go first 90% of the time, giving your opponent the advantage
Gil and Jessie are among the 2 best 2 Stars in the game, just as Rowdy, Striker, Gibson, and Marina are some of the best 4 stars.
Since there's a lower star count, you'll earn more BPs in your DT and get you higher quicker than a high star deck.