The bugs are generally per-table, and the frontend will improve, they've stated as much. Once the table's in, it's in. It's a pretty far cry to call "the game" "busted" when really it's just not totally feature complete yet. Doesn't help that it takes Sony a month to approve the updates.
Feature complete? Please. The game is an unplayable mess on the PlayStation 3, with highly noticeable flipper lag. PS Vita version is moderately more playable (as it doesn't have the lag), but instead has altered physics, targets that don't register, and goals/trophies that fail to unlock when conditions are fulfilled. I've almost completely stopped playing both versions now, since
the bugs tend to be more trouble than they're worth.
Even if the bugs are on a per-table basis, people like me who
already paid for the base game deserve to have the existing bugs addressed
first, rather than being asked to pay for future DLC. After all, if they can't even get the tables from the base game to play properly, then why should we suddenly expect the DLC packs to be flawlessly executed?
Out of curiosity, how does this game play on the Vita? Are you able to hold your Vita in portrait mode and play like that, so you get a nice verticality with the table? Maybe just use the touch screen for flippers, like on iOS? That would be fantastic since the iOS port isn't great, IMO.
I'd recommend that you avoid it. Not worth $10 in its current state, even if you do get both the PS3 and PS Vita versions (since both versions are busted). If they ever get around to fixing the numerous bugs that exist, then I might give it a stronger recommendation. The developers barely even acknowledge the bugs on the PS3/Vita now (going so far as to
dismiss the claims of flipper lag as being a problem with users' TVs), so you could be in for a very long wait.
The Vita does support portrait mode, and the visuals look very good in that mode. It looks basically the same as it does on my Android phone, and has the same touch controls. I just don't like the touch controls very much to begin with. Unfortunately, portrait mode doesn't allow you to use the physical controls of the Vita for anything other than pulling the plunger.