I'm glad it's in active development. To me, it's a sign that UTAU hasn't completely died yet. Kudos to Kanru Hua for creating Moresampler!
It's versatile with a lot of cool flags, but I don't use it often. It works well with many voicebanks, but mine's not one of them. Fixing the tone of her voice with Mt flags messes up the pronunciation, using b flags does a weird thing, Mo flags worsen the first problem... I've been trying to get it to work normally for months now. Looks like I wasn't too lucky.
Everything has room for improvement. I'm not a big fan of Moresampler right now, and I might never be, but its existence is a great thing.