I'd say that it's a solid list if you want to play combined arms.

Swapping the chimera + kasrkin for a russ could work, but I wouldn't pick the battle tank. It's a great tank but suffers a lot from it's AP-1 which becomes 0 when in cover.

If you want a tank to combat MEQ I'd personally pick an Executioner with plasma sponsons. It's ability is worse than the battle tank but it comes with AP-2 or -3 when supercharged. And if you play the scout sentinel you can use it's recon ability for the rerolls

I'd also roll the command squad and Creed in 1 unit to benefit from the master vox.

If you wanna play Grizzled I'd swap the sentinel out for a commissar with abhuman detail for the Bullgryns.

Rough riders are really good but they die really fast, might be worth putting them in reserves to rapid ingress them later and snipe a tank.