Different matters, but the same point: Marmite 1 has 1 active wardec, Marmite 2 has 1 active wardec, Marmite 217 has 1 active wardec… Instead of wardec spam you would get wardec corp spam.
The reason why CCP is reluctant to tackle wardecs it’s because the only place where a nerf would be effective would be on the target corp -once wardecced, wardec cooldown -but then some would wardec their main corp A with alt corp B to give main corp A inmunity to all other wardecs.
What else would l do? If they asked me personally, I would kill the non-consensual corporation wardec system altogether and would replace it for a structure wardec system. The excuse for the existence of wardecs it’s to remove structures. OK then, wardec the structure. Shoot at it and CONCORD turns a blind eye to it. BUT, anyone can shoot the shooters via criminal flag. Apply the KISS principle: want to let players destroy highsec structures? Let them wardec those structures for a modest fee and keep corporations out of it if they don’t go mutual.
This would make it quite simpler to everyone, and Red vs Blue and others still could use mutual wars for their purposes.
(Also, wardecced structures should be widely advertised, in case some mercenary corps fancied to drop by and gank the gankers)