degraded trigger pull is not necessarily true, if youre judging it based on more common bullpups like the AUG or tavor which uses a push link type of system, maybe, but thats about a generalized as saying all semi automatics are dirty cycling because the AR-15 has direct impingement... point is bullpups designed to use a pull linkage system are capable of just as light and crisp of a trigger pull as any other
as for a bullpup bolt action, the only way id consider this is with a straight pull like a K31 that had an oprod extension to relocate the bolt handle somewhere else while still protecting the oprod within the stock and since bolt actions are generally ranged weapons that arent going to be used for room clearing theres generally no purpose to making one shorter
on the other-hand, a manually operated action capable of some speed like say a pump action or a lever action where you could shoot more rapidly where you may like a shorter weapon, so long as you can still free float the barrel to take advantage of all its accuracy, it could be an interesting weapon, im always looking for ways to omit the gas system and on larger caliber weapons where the recoil generally dictates youre not going to have an immediate follow-up shot opportunity, a manual action could be interesting