Well you can always change the walls to overlap and do whatever you want with it then… There is also walking collision override for the root capsule which lets you only have wall collision during locomotion but during walking without locomotion you can walk through / into the walls as it uses a separate collision channel with that enabled.
The upcoming 4.18 beta branch that overhauls the main character also adds events for when the wall sliding begins and ends to allow people to customize further as well (blanking vision, adding stable boundaries so that the slide doesn’t feel personal, ect).
As far as disabling, you already have all of the control you need for that, the character follows all std engine collision protocol, I don’t touch teleport back from penetration or other solutions like that as there are many ways to handle it and they don’t fall into my ideal for the plugin.
Generally it isn’t an issue unless you are having tables or blocking obstacles provide pushback, which I would suggest be avoided. Really only walls should be doing that.