It will be PR with a list system aka only very safe party insiders will get in.

Yo wont get the "stroppy bastards" who actually hold the executives toes to the fire.

Why do you assume elected members must necessarily be better? I think a mixed system can balance the dangers (and each has their dangers) of each.

They would be beholden to political machinations which get them elected and not do a very good job at it.

There are a lot of things with HoL but being unelected is not one of them.

Human nature doesn't change. Conditions might.