It's Easter Sunday here, but I don't let little things like random major religious holidays interrupt my kernel development workflow. The occasional scuba trip? Sure. But everybody sitting around eating traditional foods? No. You have to have priorities. There's only so much memma you can eat even if your wife had to make it from scratch because nobody eats that stuff in the US.
Anyway, rc6 is actually larger than I would have liked, which made me go back and look at history, and for some reason that's not all that unusual. We recently had similar rc6 bumps in both 4.18 and 5.0.
So I'm not going to worry about it. I think it's just random timing of pull requests, and almost certainly at least partly due to the networking pull request in here (with just over a third of the changes being networking-related, either in drivers or core networking).
Aside from the networking stuff, we've got the usual other driver updates (nvdimm, iio, gpu stands out), arch updates (mainly x86 - kvm fixes stand out), and tooling (selftests and perf).
And then we have various random collection of other changes: some core mm, some filesystem fixes, scheduler and tracing stuff.
But despite rc6 being a bit larger than I'd hope for, all of it is pretty small, and I don't think there's anything really worrisome in here. In fact, a lot of it is truly trivial stuff, some of it just spelling fixes and the like.
Have a gander at the appended shortlog for details if you care, but more importantly, give it a whirl and kick the tires...