Or shorten just that channel no need to insert a plug

That is an option, but the Transient plugin can increase the initial attack of the snare (in this example) as well as just shorten the sustain. It does help with the tight/punchy sound.

Some people dont do this last meothod as they dont like shortening the room mics

To counter this problem, use the ‘Fade’ slider for the room channels and slide it to the right. This only effects sounds that have been faded using the Envelope filter and can add a bit of the real room back.