I really don't think those Q&A videos are some portent of doom or anything like that. Sure, he's clearly stretching the soup by splitting up his monthly Q&As into bite-sized chunks, but at least he still offers more actual information than your average dudebro "LOOK AT THIS HUGE GUN I GOT TODAY". So long as he doesn't try to switch to high-intensity-low-information videos, a genre he's genuinely terrible at, I don't think he'll be in any kind of trouble. His Ask Ian videos are varying wildly in viewcount, but so do the rest of his content. A video on an experimental version of the Garand or the STG will always get a ton more views than a video about an obscure Spanish pistol from 1909 or whatever.
As for him being too busy for InRange... sure. Might have been an just excuse back then, but it's certainly not just an excuse now. The dude has clearly taking a liking to writing books, and between researching, writing, and rewriting, that shit takes time. Plus he seems to be part of a bunch of different minor projects scattered about. Between traveling, editing his videos, and now writing books (and wrangling the publishing back-end) I fully believe he doesn't have nearly as much time as he once had to just putz around with Karl in the desert.