I have one of each, bubblewise. People keep bringing it up, but Dave Dunipace and plenty of others have said/shown that the proximity of the bubbles doesn't affect the flight. It should on paper, but it doesn't in practical life. My experiences agree with that. There are good reasons for this, one of which being that wide-rimmed drivers are already pretty inherently gyroscopic and the minute amount of weight removed/displaced by bubbles isn't enough to appreciably affect it.
Also, since blizz discs have varied so much in several ways, it's not so wise to make blanket statements like you just did about weight, flight, etc. Both of mine are sub 140 and are fantastic...Destroyer is just like a max weight one and the Wraith shaped up exactly like it should have, although it's a bit less stable overall. But they've been all over the board...all stabilities, all weights, all molds. You just need to be comfortable shopping for one you want or be comfortable with drawing straws.