Is changing a masternode IP accepted as a valid workaround for infrequent payments? Or is it more of a troubleshooting "can't hurt to try" sort of thing?
I can only tell you that, like some others around here, I had a 'bad luck' masternode (2 payments in 17 days) and re-built it with new everything (new IP, new address '0', new masternode privkey) and so far it's paying out much better now (2 payments in 2 days). Definitely worth a shot IMO.
You could also be building towards votes right now and fuck yourself by disappearing...
2 days is nowhere near a useful sampling for the depth of probability here.
The only "problem" is that the probability depth is much, much longer than the average money hose operator's attention span...