What problems are there with the crusade rules for your faction?

While trying to come up with rules for a small crusade for a group of friends where we can use legends units, we realised there's definitely chunks of things which could be added/changed to include legends units.

I've learned not to expect much/any support for legends units, but it's nice to allow people to use them and gain some crusade buffs, or even detachment rules.

For Aeldari; Shadow Spectres [legends] don't have the Aspect Warriors keyword for the detachment which cares about that, and aren't able to get the Aspect warriors battle traits.

Wraith guard/Wraith blades don't get anything from the codex.

Wraithseer [legends] don't count for a bunch of stratagems in the Spirit Conclave section.

For Orks; Meks cannot be the waaaghboss

the meka dread doesn't have the mek keyword, despite having the same Mekaniak ability that basic Meks have.

I'm sure there's others I've forgotten/missed.

I also don't like that a few agendas for factions essentially ask for you to do an action, without saying they want you to do an action. Mostly thinking of the Astra Militarum Arming the Assault.

Especially when they then add a battle trait which is "you can advance and do an action" in Nachmund Gauntlet.. technically it doesn't work for that agenda, but obviously it should.

What are some that you've noticed?