It seems you misunderstood me. Level 8 creatures are good because they are on the base of the upgraded level 7. They will be worse if they change - like a dragon level 8 for the Tower (and dragons have nothing to do with titans).

Indeed, they do need a remake - most of them are just recolored versions of the original ones, and they shouldn't be - when Angels upgrade to Archangels, they change so much; when Archangels "upgrade" to Supreme Archangels, they just change their colors. They should have more stuff on them. Like, Hell Hydras could use an extra head or two. Ghost Behemoths should be remade, because they simply don't fit the Behemoth picture - they should do more damage and be less "stealthy" - they rely more on brute power. Archangels could use a halo over their heads, a better sword and, overall, better equipment. Diamond Dragons should be changed somehow - like when Green Dragons become Gold Dragons, they don't just change their color. Overall, every level 8 could use a remake.

However, current level 8 creatures look good enough to me. I would like more to see new content.

Also, I have a suggestion - make henchmen's stack experience at level 10. I always hated the fact that my ordinary creatures can do things my henchman can't...