I think most people have problems with spiritia, giant space monsters and flying rocks due to the presentation. If Glavil and Geppernich looked more sinister and imposing , maybe like the STC Monsters from Gunbuster, then ppl will not have a problem with it, instead of looking like colorful "Monsters of the week". The twin protodeviln that looked like Siamese demons were especially wonky, but if you gave them a re-design with the exact same powers, i think they'd look awesome.
And if spiritia was depicted better rather than a beam of light appearing from the VF-19kai's uniboob.....i dunno how i'd depict spiritia though.