It's not that drastic :-) I do this all the time - I often add features to a beta version of mIRC that I think might be useful but after testing or feedback I may decide that they do not quite do what I thought they would do, so I remove them.

Based on the above feedback it looks like this feature has a number of issues and if I did make it optional many users would probably turn it off.

Since it was mainly added to help new users logon more easily, I would rather remove it and add a better method to help new users logon.