Your best shot would probably be to deepfake Tarkin onto another character in the background.
But as is, for me the cameo in RotS is enough. And he also shows up in Clone Wars, so no urgent need imo.
It’s not critical for me either, I just thought it’d be cool.
Another thing. I’ve talked before in another thread about my desire to give each Sith their own unique ability. The force lightning is Palpatine’s; a classic warlock power. Dooku is vampiric, temporarily drawing on one’s life force like a parasite. Vader is his iconic force choke (tho I might consider adding another, more “cosmic” power as well, but one that reflects his more blunt personality). What about Maul?
It took me awhile but I thought of it, and it also closes a plot issue.
Maul is like a hunter, animalistic. What if his power is a heightened clairvoyance, sort of like a carnivore’s sense of smell? It closes the plot hole of how the Sith got a trace of the Queen’s ship if Obi-Wan prevented them from making any contact.
It’d require removal of “If the trace is correct”, as well as some sort of visual indicating that he uses the Force to discover the location.
I can’t momentarily think of how this power could create any new plot holes. I’d need to mull it over a bit more.