I havent looked at the GHB2019 for the terrain rules since they came out, and due to a baffling amount of mistakes in regards to the rules for setting up terrain etc., a lot of the community just ignored all those pages and pretended it never existed. Im honestly surprised you play this way, it is the first time I have ever heard of anyone following those rules and playing accordingly. Most of the guys I play with like to play in tournaments, so it makes little sense to have one ruleset for "normal matched play games" when tournaments have a completely different approach. Might as well try to replicate tournament games as best as possible during our casual stuff for practice. That is why I dont see the Arcane Ruins as a means to "balance out" the case with the Realmshaper Engine, because it would never happen in a tournament setting and from what I have seen, many people play with randomly rolled terrain.