Youve side-stepped the entire point with this post.If you are worried about this then you probably dropped the wrong list to start with. Any list that ignores his feat immediately skews the game.
I agree with all of your points, there are many ways to get around stuff, just like there are many ways to get around pretty much everything in this game. That is the nature of the game. It comes down to positioning, knowledge and player skill.
The change to the feat makes it a little harder to get 100% coverage but it is still possible. You are also forgetting that wurmwood has answers to a lot of things. For example the speed 7 reach jack that can walk into the forest? I stranglehold it so its not a threat. There is a reason that wurmwood is currently considered the best caster in circle and one of the top casters in the game, even after the nerf.
There are too many possible combinations in any conceivable game to cover every possibility in a single discussion. Saying you cant play X because Y counters it is pointless unless Y is prevalent in almost every match up. The reason wurmwood wasnt played much in Mk2 was that eyeless sight ignored forests and legion was common at pretty much every tournament instantly cutting one of your lists from selection. That would be a legitimate concern.
Either way it's clear we have had very different experiences but in my opinion the ravagers have a good place in the right lists.