was it worth doing this or if it would've been better to just post here and let a mod do it in bulk?
Yes, it was worth doing, but only if there are a few of them. If there are lots (I'd say, > 20) then don't bother, we don't want all those questions bumped to the front page. Post a question here on Meta and we'll take care of it. What I also suggest you also do is suggest a synonym as well, which comes to the next question:
how does a person set up a tag synonym?
There's an (un-finished) question on MSO here: http://meta.stackoverflow.com/questions/70710/what-are-tag-synonyms-how-do-they-work