"The longer I hold my feelings in, the greater the chance of me blowing it badly at some point when I can't take it any longer. Better, I think, to choose a good opportunity (like when we're connecting) and make my feelings known in a constructive manner. Follow along and take notes kiddies!!!"
I completely get your frustration but be careful. I know you deserve a better fulfilling M but remember no pressure. The car could be perceived as pressure and if she is anything like MLC or even a normal WAS then your feelings wont matter to her. This is all about her and her journey and I worry even if you try and put your view across in a constructive manner she will bolt. She can't handle her own feelings let alone yours and the last thing she needs is reminding about what she is doing to you and how bad it makes you feel.
It really does look like she is not going anywhere and getting through this in her own way. I know you can't wait forever but you are still early days for MLC. Just keep the focus on you and let W work her own path. I am sure she will talk eventually about the R but unless you are 100% prepared for her to walk I wouldn't even risk planting that in her head by talking about how you feel and the R in general.
FWIW it also sounds like she is letting off steam and not on the look out for an OM.
You are doing such a good job and seem to be in a good place and as you have said you are not going anywhere.
Just give it time, dig in and let her come to you. I am sure it will happen but on her timeline. Unless an OM does appear there seems to be no reason at this point to rush her or back her into a choice she is not ready to make.
I know you won't do anything rash and perhaps I am overreacting/misreading your posts. But my view FWIW would be to still sit tight. I am of course a bit sensitive to all this as I learned the hard way with W and she bolted. I too thought I was being constructive etc etc but all she saw was pressure when she was just extremely confused. This made her feel bad that she could not leave me dangling and forced her into making the decision to go. All this was just before I started DBing but still very relevant. Would she still have gone.....IDK, but I sure as hell lit the fuse paper for a quicker exit.
She needs to feel safe and that you are the light. Remember you want her to come to you because she wants and not because she feels bad/pressured.
Hang in there buddy. You are doing great and I still think you 2 will be fine.