<p>(Take this as personal opinion speaking as an ordinary user)</p>

<p>If it's an edit you'd accept if it was from a different user -  an improvement without changing the intent too much - you could accept it whether or not you were sure it was the original poster.</p>

<p>However, if it actually is the original poster suggesting an edit from a second account, I regard the merging of accounts as generally more important to fix first -- this is so we're not running around after the same person doing it again 20 minutes later and again an hour after that. If we do what they want (accept the edit) but rely on them to go to the trouble of merging when they can get things done by making us run around instead, why would they? </p>

<p>[Sure there are well-intentioned users who will do their best, but many people are lazier if they can be.]</p>

<p>So I'd suggest using some judgement -- while it's good to get questions improved quickly, it's also important avoid the OP continuing to suggest a number of further edits from the second account (or a third...) instead of merging.</p>
