My hands are average so I haven’t had an issue. I bought used and it came with a thumb grip. Also I keep a leather shell case on it, feeds into the retro look and adds some bulk. At no point have I found it uncomfortable and no one else who has picked it up has complained given what I’ve added to it.
On Subaru and CVTs, I hate most modern automatic transmissions due to the rough shift and indecision but the Subaru CVT ain’t bad at all.