If you are using a Partner Griddle it has a gap very specifically existing to permit proper ventilation. Look at this link.
As I stated, one of my griddles is larger than the surface area of the top of most Partner stoves. (In the past, I frequently provided for private trips larger than 16 people which is why it is in my kitchen options.)
My "evidence based comments" apply to heat dispersion and hot control knobs. It also applies to people whose stove sputters and flames out with large pots or griddles in place.
The problems described are not diminished when the stove is on a Partner stand. The air intake is on the sides. Heat out should be up. Maintain that relationship and all is fine.