I considered making multiple degrees of being swallowed, but it just doesn't seem to mesh with the 4e system very well, for the reason you mentioned (no more multiattacks). Instead, I made things a little harder on prey by introducing 'Digestion of opportunity' attacks if the prey tries to escape or attack more than once per round, and gave predators the option to 'rest', giving prey heavy escape penalties in return for making the pred prone and helpless. All of this stuff, as well as some new vore feats, are in my latest post in the game thread.<br/><br/>And, as you may see, I reconsidered a couple of those feats I mentioned. A blanket +2 bonus on all vore is a little too good, especially since vore in general is more powerful now.