So much pain, misery and suffering could have been avoided if someone* had just allowed Perturabo to design a playground once in a while.
*By which I mean a certain 10-foot tall, golden-armoured, terrible narcissist father of a 'someone', so not much hope of that I suppose.
Considering how slow Lorgar was allowed to conduct his compliances till consequences started to come into the picture, I don't believe that Perty had no elbow room to linger at least a little while to build something nice.
Plus, Perty not being petty enough to have a nice-guy™️ personality reliant on praise (along with doing more to earn said praise than demonstrating a horrific disregard for life and comradeship) would've been nice.
