It still doesn't really make sense to me. You have this super secret base that isn't very secret nor very hidden, and then you have a tunnel that isn't particularly hidden located with an opening pretty much next to the main entrance. And of course there's a very, very obvious elevator round the back, and said elevator does not lead up to a highly fortified area that nobody could get to.
Mainly, the whole map is just too cramped and the grove is not really fortified in the way I'd have expected from something that is meant to look like a really tough nut to crack. And having that tunnel be just about a straight highway right into the heart of the grove without any real obstruction or defensive elements other than some weird statues that are scattered somewhat randomly is just wrong.
It would be much better if the cave mainly lead to somewhere other than the grove, maybe a disused tempel for this or that god, or maybe some place where shadow druids like hanging out, and then there's an incidental crack in the corner of a room somewhere in the cave that happens to leads to some more tunnels that then connects with the grove. This way the statues are not directly linked to the grove but to whatever is in the back room, which is the main purpose of the cave and tunnels. And this in itself makes everything much less confusing, because if the grove can actually construct these kinds of statues for defense then why didn't they place one or two out front?
Lastly, the idea of having statues do nothing to anything within a hundred feet of a circlet wearer doesn't really make sense, because that way they'd be totally irrelevant the moment an enemy force captures a single druid, and it isn't the druid way to just stay fortified inside a camp forever and ever. Maybe shadow druids would do that, but regular druids probably would not. And it just does not make sense, at least not to me, to construct that kind of super-powerful magic statues and then make it so easy to bypass them.
