I just finished reading Aftermath. It’s not the best, or even particularly good overall, but I didn’t mind it and I think “frag” is a far better substitute for “fuck” than “kriff” ever was.
The Aftermath books get progressively better as they go on. The first one is eh, but if you’ve already slogged through it I recommend sticking with the series because it only goes uphill from there. Empire’s End was more or less on par with Bloodline and Catalyst.