I would like to suggest something to improve/add to the website functionality if possible. I haven't seen this posted so sorry if it is a duplicate, but it would be nice if you could add mods by means of drag and drop from files you already have, to drop on the server side mods section. This way it saves a lot of time and effort having to manually add them one by one and having to download from official sites for client side.
I did see something about FTP in another thread, but surely something could be done, even with filters in place. Only allow .jar files etc, search the filename from official list of accepted file names etc. It would make things easier for us.