Not at all trying to be argumentative. I see your point. Maybe I'm just no good at doing that. But if you pacify, visage, time slip and vortex him, don't you end up spending close to 200 nora to do it?
Depends how much of their strategy revolves around it - I stomped an Elven Ancestor deck pretty good because their whole plan was to rely on it. I just ignored it and booped their shrine. The pacify is "free" via Oracle & Bard (though Reclaim is possible when you need it), and they usually won't have impenetrable unless they are going all in on the superchamp plan. Vortex & Time Slip cost, but you can usually make the stalling worth it.
Tortoises can't swim, and plants (except for aquatic plants) don't benefit from being submerged in water. They die. It makes very little sense for ambling frond to have amphibious, except that corpse was an idiot and probably didn't know the difference between a turtle and a tortoise. The new flavor text is also terrible.