Depends on the standpoint...if you have your script(s) already done, then the only thing to do is to draw. You only get faster at drawing by doing it repetitiously, understanding what you want to do and the effect/style/techniques you're trying to achieve, and understanding how to translate the story to the most effective pages that you can create.
Also take into account that things take TIME; no amount of forcing yourself is going to create a better product...faster, yes but sometimes that can NOT be a good thing. I usually do about a page per week, given the fact that I work a FT job so I have to work whenever I have the time to and when my body is refreshed. I wish that I could do more faster, but that would mean my end result is probably gonna be something I'm not happy with.
Writing, as in the act of writing is NOT going to make you a faster creator; understanding your strengths, weaknesses, and how to maximize what you do best plus the ability to learn & utilize new techniques are what will help you get faster as a creator.
1) If you are writing on the fly(i.e., a page per week or whenever you upload your episode)- that is the culprit. Write an entire chapter/volume/whatever...sit back, review it, and see if there is anything that you feel you may need to cut/add/change to make the story more simple or less convoluted. I write my scripts months ahead of actual production time; gives me time to go back and review, make changes & tweaks where I feel they are needed.
2) LAY OUT pages/panels...if you are drawing on the fly and you're not a particularly efficient penciller, then layouts help you plan what you want the page or panel without trying to create something fresh on the go. 40 pages is a LOT, depending on level of detail. My webcomic is 40 pages- given the fact that I work a FT job, it takes me about 8 MONTHS if I power through.
YES you can. Then you can create a "retro prelude" going back and explaining things leading up to the action point. It's a break in the pacing, but an effective break that pulls readers in IF done correctly. If the storytelling gets drawn out longer than it needs to, readers will lose interest(which is pretty much a general rule with comic story flow).