FileZilla isn't crappy at all, just say you'd prefer to use something other than FTP/SFTP if that's what you mean. If you're using Windows you could just the GCW Zero Manager already (granted it still uses SFTP, but it's a little bit less tedious after the initial setup especially if you're just transferring OPKs. You could also use WinSCP and switch on explorer mode which changes the program's interface to look more like windows explorer.
I have to agree with alexei_gp : FileZilla is not designed for file transfering to a local device.
Also, since Filezilla by default is set to "Auto" mode, that means sometimes files can be incorrectly detected as ASCII files
and it will end up with a corrupted file on the Zero.
You don't know how many users ran into many issues on my emulators only for them to realise it was due to Filezilla's default.
That said, last time i talked with pcercuei, he said he has not worked on mtp for a while and he did not tested it.
Here's the mtp daemon on his repo :https://github.com/pcercuei/mtpd
As far as i know, i think they had sucesfully switched to the new build system but i'm not sure. (i have not checked that)
There is still a lot of things to be done before they can release it or else you might end up being disappointed.
It might take a while tho... I'm not sure if it will be released by Mid-2017, as it depends on a large amount of factors.