I would like to see new kits for the saurus warriors to bring rhem up to date. Rules wise i think theyre fine, maybe 2hweapons would be cool, like 2x10 sw.
Temple guard with 2 wounds or some way to negate MW for them when near a hero/slann, if the enemy has MW they're screwed all over way too hard.
And also the knights, i hate the whole kit, it's awefull, they could bring them inline with the total war 2 knights, and be a dual kit with the even more elite cavalry in the horned ones.
Loved those models in game, they would be a ton of fun to paint and model.
Then new kroxigors, and Nakai/kroxigor hero, with a batallion using skinks, and plastic razordons/salamanders.
That's all i would want, maybe the revivification crystal rule for for the bastilodon. But besides that, i think we're fine actually on models and diversity, SCE have just too many of the same thing slightly different, and i feel no envy to their range. Only for the flying guys with hammers, those are sick cool.