Like Russ Bullock said in older Interviews there was kind of an "Arms Race" in former MW titles, where ppl tend to get the biggest Mechs and stuff as many Weapons in it as they could.
The Hardpoint System might be a good Effort... but everything whats fine with it, does also make it bad.
This is not new, there is already another "Arms Race" going on.
The so called "cheese" builds are the best examples. 6 Energy Hardpoints on a Stalker...
who would not boat 6 large lasers or the more common 6 ppc´s in it??
it´s the best damn choice.... because its possible. and thats the problem
the hardpoint system is "disturbing" the main roles of some mechs
even to be able to put an ERPPC ( for example ) into a commando is ridiculous to be honest.
another example:
according to sarna....."The Catapult is an offense oriented, second-line fire-support BattleMech......."
some of the well known K2 builds however, are nothing like that
double gauss and especially double ac20 are in the right hands an all out assault playstyle
i don´t hate "cheesebuilds" in general btw, they are just the best examples to explain what i mean and feel about it

the hardpoint system of mw4 wasn´t that bad if it comes to this, you had energy/missile/ballistic and omni if i remember it right, but you had 1 to 4 slots to show the maximum "size" of weapons that could be used
something similar to this would be preferable for mwo as well, in my opinion
player customization is fine, but there have to be at least a bit more restrictions to it
sorry for my english :|