It's this notion of a "somewhat final decision" that's the problem. Two editors, at least one of whom must be a sysop for technical reasns, should be all that's needed for undeletion.
Ec
Why should 2 people be able to overthrow a bunch of others in case where there's nothing wrong with their judgement? You'd need a bloody good reasons for an undeletion. If you have evidence they were misinformed, undelete. If you know they didn't provide a valid rationale, undelete. If they provided a now outdated rationale, undelete. But undeletions as well as deletions should be proofed and checked by the community before they happen.
What makes you say only two people are needed?
Mgm