As a combo finisher I agree. it's especially noticeable in outlaw since the tools in gunslinger allow you to do a coin shot or something to follow up while being safer than running/jump in to try and continue pressure.
In gunslinger I do find use in meter burning the last bit to zone after, but that's only off a tick throw since the damage scales well to 19%. People expect the sand tackle nowadays on the fourth hit so lately I try to do it anywhere in the 113 or 211 since It's not as common.
I mean overall , yea as an ender it's not worth it unless you're going for damage , thing is that it was a big hit to his wallcarry+oki , outlaw ending in stab sacrifices a lot of wallcarry and wall is what you actually want as Erron to limit their spacing options since all his best tools either are high or can be avoided by jumping back and playing vs a lot of characters in the neutral can be very dangerous.
Nowdays if you want to try to get pressure w Erron you gotta either end w Stab ( outlaw ) or sand granade / f24 ( hard knockdown) wich sacrifices wallcarry and damage , i get prepatch the hit advantage was kinda exaggerated but now you totally can't pressure after sand trap without taking big risks.
Goro gets a guaranteed EX ground pound after his cmd grab , commando Kano gets knockdown pressure , Cassie same and while we're at it im baffled why EX slide has even less hit advantage than normal slide.
