I recommended an Epi Rumblekat, but after watching the youtube thing I wouldn't suggest spending one dime to play with those guys.
Your stuff is fine.
The guitar player's tone is bad (imo), maybe because of Epi HB's and/or a lame amp.
The drummer lacks pep.
There needs to be an interaction aka locking up between the drums and bass for that type of thing. The way it is now, it comprised of 3 parts boring.
Here's the bassist before the guy who's leaving:
He's been using a rotating cast of drummers and bass players. I think if I can lock it down tight it could work. If not, they're paying gigs...