I understand the feeling entirely! I had a bit of a journey like this with the Balor, and I can firmly say that it's my favorite mech now.
My personal idea - this a ramble and you can stop reading now - which requires playtesting (LT has been great for that, and led me to feed my boyfriend some very spicy takes on what I think is better than what) is just to use it as its description states and literally breach with it. There are a few potential systems to use with that; Interdiction Field, Swarm Body, similar 'fuck you for being near me' systems, but the main gimmick I had in mind was pairing it with a Goblin that could hook to it and hack with its LoS, without putting the Goblin at risk.
Very situational, but I think that sums up the Nappy in general. (That, and the full sentence "What in the name of god is half this license?")