One thing to add on the MOLLE aspect is weight - I have a MOLLE covered back pack and I wonder how much extra weight is added by all the MOLLE. I have a similar sized pack without MOLLE and it weighs a kilo less!!
This is a heavy rucksack anyway to be honest. The molle will probably add some weight, but it's not a massive area that is covered by it, so i expect the weight gain to be minimal. I know what you mean about molle though- i find it a bit of an unnecessary addition in most instances- that adds weight as well as compromising a fabrics strength and waterproofness.