I think the animatronic will be fine in the long run. The yeti in Expedition Everest appears an order of magnitude more complex than this crocodile, and the problems associated with it can't possibly be as unfixable as those that trouble the yeti.
For the record, the problems with the yeti isn't in the animatronic itself, but the concrete base it's sitting on (or, rather, the concrete base that attaches the structure the yeti is sitting on to the ground). The movements of the yeti caused the concrete to crack more than was anticipated, so for safety reasons the yeti was displayed in a static pose. To fix the issue, they'd have to take out the yeti, tear up the concrete slab, pour a new one and rebuild the yeti. Problem is, the structure of the yeti is intertwined with the supports of the coaster and those of the mountain, all of which are tangled up in each other but don't actually touch. The dynamic forces created by the coaster would mess up the yeti and vice versa, and both are detrimental to the structure of the mountain. Therefore, it's three independent structures built inside one another, and you can't dismantle one while the others are standing.
Unless the crocodile has problems that originate below the concrete trough of the rapids, I think they are fixable, and an entire overhaul could be possible if necessary.
