I came from Instapaper after their price hike to Omnivore and went back to Instapaper. I felt that Omnivore was over-complicated with their "every folder is a filter" structure. Instapaper feels much more straightforward.
I did the same and will likely end up back with Instapaper. Omnivore’s export leaves a lot to be desired, though. Trying to find a script that will give me something usable to import.