You can cut some of the molle away and run your holster on the belt itself. You won't want anything at least a few inches fore and aft of your holster anyway.
Also, I am a HUGE fan of keeper belts vs. suspenders. However, you do need to wear your keeper belt any time you're using the rig as it will sag some. In a SHTF or civil unrest situation where you'd need to toss it on and run, you'll be ok. I just keep my keeper belt in a utility pouch when not in use.
As for other stuff to put on your battle belt, I am by no means an authority on the subject but here's what I have on mine (from left to right)
Otis gun cleaning kit
3x AR mag pouches
3x Support side pistol mag pouches
Small utility pouch with dump pouch attached to outside (gets dump lower as I'm not flexible enough to quickly get to a waist height dump pouch at my 7 o'clock). Utility pouch holds an AR-oops kit, 2 small punches, 2 hot hands warmers, 2 protein bars, 4-5 single pack gun wipes (think hand wipes at joe's crabshack size), a ziplock with 4-5 baby wipes, wad of dryer lint for fire starting.
Quick detach IFAK with Tourniquet on outside (Content list available by PM if interested).
Gerber LMF2 with mag fire starter
Custom 2.5" drop holster without thigh strap
Strong side pistol mag pouch (about the 1 o'clock position)
Very nice looking start though, if this will be your first time shooting with a good belt, it is WELL worth the money. Nothing worse than walking back to the table every minute or so to pick something up or put something down. Everything has it's place and you can sustain longer than most people on the line.
15' White JKU- 2" lift, 35" tires, Gibson MM exhaust, etc.