The Grinko fight, the vault fight, those technically weren't boss battles.

You were dealing with ordinary people that could be killed in ordinary ways.

They were no more a boss battle than were any shooter games that have ten enemies running at you, and you have to shoot them all. The only difference is, shooter games actually excel in that area, and Splinter Cell made you do it slowly, and cumbersomely.

The only true boss battle in the first game was the Feirong suicide fight, where you had to use a different strategy to get ahold of him.

To answer the original post: no, I think it would be a terrible idea. A true Splinter Cell game allows you to sneak up on the "boss" quietly, and without him even knowing you exist.

Squaring off in an arena for a death match using awkward and unusual tactics is a big no.