I personally would love an all grey Acclamator and an Imperial Venator. I feel like they could significantly change the stats on an Imperial Venator to represent wear and tear on the ships over the years, reduction in firepower, maybe reduce hull by a couple points, reduce command and engineering values due to older equipment and lack of parts, possibly reduce max speed/turning by 1 for highest speed value, reduce upgrade slots. Any kind of combination of these to differentiate it from the Republic ones. I feel with enough changes or significant ones you could definitely alter the feel of it.
We get our Venator , yet it feels different enough so it isn't a carbon copy of the Republic's.
I dunno just throwing out ideas