Solid Hardwood, Engineered and Laminate Flooring - Here's another particleboard question for ya (Particleboard Subfloor)

Well it looks like the builder may come through and fix my huge "soft spots" in my floor. (they're all over the main floor of my four year old home) The only problem with him fixing it is that he will probably use crappy stuff a second time to save himself money.
We currently have a particleboard subfloor (not t&g). I'm certain he is going to just want to go on top with another layer- is this ok? What should I ask him to use material wise (definitely liquid nails and screws right)- is particle board ok? Should I offer to pay the difference and upgrade to 3/4 plywood? I'm going to be laying laminate on top as our new flooring. Thank you guys so much for all your help - I've learned so much from this forum! :)

Particleboard is simply not a good subfloor or substrate for floor covering. It is saw dust and glue and will not hold a nail or staple. If properly installed, a floating laminate or floating engineered wood floor or carpet can be installed over it. A 3/4" plywood subfloor is preferred (glued and screwed). There should be no soft spots or movement in subfloor. Most contractors cut corners by not using glue. In the future, should you decide to change floor covering to solid hardwood (nail down installation) you will wish you had the 3/4" plywood subfloor for nailing.