Kevrock hits the nail on the head RE: quoting posts. Linty is also correct about the mobile verison. As for the "you are ignoring this user" bit, that was there in the old version too, but I dove into the code and cobbled together an ugly little hack to remove the posts altogether. A sharp eye would notice that the background of posts before and after an ignored post would be the same color (instead of alternating). I never got around to figuring that out.
Short version - these are all valid complaints that I share. I can't promise any of them will be resolved, but I check for mods on the SMF site periodically, and I may look into updating the ugly hack.