without more specifics, I wouldn't be able to give a fair or accurate opinion on your current rig.
Which i7 processer are you using? there are many different models of varying ability(personally I like the i5 quads best for gaming tho out of that kind of processor... i7 potential isn't realized in the gaming industry very much and can hinder you more often than help currently. If you look at your CPU usage, 10% while running PE, your probally running 1 core out of like 8, and there isn't always an easy fix for this, depending on the game. LUCKILY, I don't think PE uses much processing power, very little actually.)
what speeds are your RAM sticks? access speed is more important than amount of gigs a ramstick holds,.. although you could stand to get a couple more gigs RAM I think- 4 is on the light side these days.
and no mention of your graphics card.. which I can only assume is a crappy-semicrappy integrated card, as is typical of most laptops.
yes, laptops get hot usually when gaming for any length of time.... how well they handle it widely varies- but I personally would not trust a laptop for serious gaming.
I recommend building your own PC for the savings... plus most often you can build a PC more powerful than a store bought PC at the same price(your doing something wrong if this isn't the case).
But you don't sound like that is an option for you. If it is, you can message me and I can help you figure something out- alternatively, there are sites that actually offer this kind of advice in a rather timely and accurate manner, and would likely give better advice than myself... I think Tomshardware forums? cant remember for sure. I'd try them even if building your own isn't an option.. they'll gladly work with the conditions you set.
And with anything, research before making any purchases, no matter who told you what.