Kinda what I feel too. I tested it and the spam was definitely slower than before, but not too much that you can't kill people. Desperado still does huge damage and the fact that it hits randomly from 3-6 hits throws people off their seed rhythm. The spam then was so fast that it becomes so easy to just go in, spam despe and kill people. An increase in damage here and there(on rapid and despe) and probably introduce new weapons for gunslingers(shotguns, gatling) will definitely solve this issue.
I personally can and still kill people with the delay set now but I have a suggestion. Make the guns have the delay reduction. I mean, the third kiel is practically wasted on gunslingers anyway, let them be like WS that can 2 kiels and put the rest of the delay reductions on their weapons. That way, they still have slower spam than before, but gain a little advantage of having an extra slot that is not used for kiels.