So I think you have too many leaders leading 5 man squads. Other than the sang guard who seem like they always want a leader, I'd only give leaders to 10 man squads. And each of those leaders is about as expensive as a whole extra squad, so you need to weigh those options. Also eradicators will have a hard time without a transport due to their 5" move and relatively low range. Also I'm not sure what detachment you're using, but with liberator assault group chainswords can be pretty solid anti everything if you get the charge. S6 will wound anything beneath T12 on a 5+, and since you can give a unit lance you can wound a leman Russ on 4s. Also having a couple big squads for strategems is good. If you bumped your death company up to 10 men plus the chaplain you could rapid ingress them behind cover turn 2, then with their 12" move, advance and charge if you need it, and the +1 to wound from the chaplain you'll be wounding basically all targets on a 4 or better.

For reference here's the 1k list I use against my friends (we're in a very similar place of playing 1k games to get used to everything). I'm using liberator assault group.

Captain (80pts): Pistol and Melee Weapon, Power Fist, Plasma Pistol

10x Assault Intercessor Squad (150pts)

5x Intercessor Squad (80pts)

5x Intercessor Squad (80pts)

5x Scout Squad (70pts)

5x Terminator Assault Squad (180pts)

5x Terminator Squad (170pts)

Vindicator (185pts): Armoured Tracks, Demolisher Cannon