if you put an induction kit on - they'll not replace the MAF or anything related to the air filter... depends how picky they want to be.
MAF's are very commonly diagnosed as faulty. They cost around £80 to replace. Up to you if you risk it.
Put it this way, if you do your listed mods and have a
problem with you suspension, do you think they'd be able to blame your mods? Don't think so.
If you think your dealers going to be a pain, just remove the mods when you need to take the car to them! The DV - they'll probably never spot, esp if you get the black forge 007P.