Bump - This suggestion ended up on the 5th page. Still believe that this suggestion would be a good addition.
Usually it isn't, but sometimes it is. Trau's mod creates a fixed queue of enchantments to add to a tool, regardless of what enchantments it may already have. The server command for enchanting also counts towards the packets you send to the server. So if you're unlucky and lag, or do some other activity inbetween the 5 seconds you're enchanting, you might get kicked from the server for sending too many packets.
full support, wish this feature remained on the server once we transferred over from classic to sb. would be way easier to have max enchants added rather than adding each individual enchantment to a tool. fingers crossed that this feature makes a return!