Changing the UI to no longer work is a very non-emacsy thing to do. There's
a lot of existing doc and tutorials explaining the org template system, as
well as current users who have trained fingers. Breaking <s[tab] will be
unpleasant.
ELPA makes package upgrades much more transparent, which means users will
not necessarily notice that Org is getting updated. And emacs has trained
users that upgrading is harmless. Without intervention, emacs will behave
the same as it did before.