i am the same as you—for years i only had a mac, then a year or two ago i got an op-1. then the norns sold out before i could decide so i got a grid. now i have a grid and a norns and an op-1 and ableton. it’s a slippery slope!
i have been using the norns without the grid lately and having a bunch of fun with it, i think it’s still worth it— but the most monome-y stuff does benefit from a grid, especially if you don’t want to learn to script norns (but you really do, it’s easy and adds so much!)
there’s a granulator engine that has been inplimented in several scripts, a couple of which don’t need the grid. there’s also a couple of loop options that are fun to run as post sends (loving cranes! thank you dan). there’s a pitch shifter and a filter that also work as send fx. along with the master reverb and compressor. generally i think the fx options are not being as explored as the other aspects of norns right now, but it’s still pretty early days.
also your midi stuff should all “just work” with norns and there are scripts for midi already as well.