>>11881889I'm of the opinion that X5 had a better level design than X4 if you remove the duff mcwhalen autoscroller from the equation. The stages on X4 almost never stop you on your tracks to take into the scenery or force you to think how to solve the platforming. 90% of the stages you can dash-jump over everything straight towards the boss-fight, this was clever because X4 shines the best with the boss-fights, so you don't think about the stages as a whole.
X5 fucked it up huge with the boss fights, all the bosses except black devil and the repliforce guy are laughably bad.
X6 improved upon the model of level design of X5 removing the shitty autoscroller, but went overboard in some elements such as the environmental hazards like putting spikes in everything and everywhere, it got absurdly annoying in the last gate stage and they fucked it up entirely with the trash compactor.
On regards to bosses, X6 didn't do much to rectify the bad precedent set by X5.