I'm following a bodybuilding routine as i'm looking to get back some of my old size that i lost on my 2 year break.

Explosive strength is not easy to attain, i've heard this before and it does ring true

"It is significantly easier to get an explosive athlete 'in shape,' than it is to make an 'in shape' athlete explosive. The first will take weeks the second may take years."
Power Cleans
Military press
Bench press
Squat
Deadlift
Bent barbell rows

These exercises are compound lifts and tax more than one muscle group, they help to build a strong core rather than trying to use isolation lifts (such as one muscle exercises i.e. dumbell curls).

Bodyweight exercises (such as plyometrics) are good for being able to maximise the force the body's muscles can 'fire' into action. IMOthey are good for jumping higher and running that little bit faster but they really only deal with your own weight.
I.e. if someone is on your back grappling you, its going to give you a bit of an edge but not like if you were deadlifting 300 lbs every week

That training routine you got off the MMA forums is good for strength and looks like an endurance test too lol... compound lifts, minimum rest, you would see good results for MMA.

Low rep/heavy weights is good for strength, i've seen olympic lifters use these styles of lifting, its a trade off between strength and endurance.

As you can probably tell there is more ways to achieve you goal of explosive power/strength, its just choosing the right routine and IMO its with the MMA routine you sourced. The routine contains many of the compound lifts i mentioned and its designed by MMA's for MMA's

Great to read that you've got your diet sorted

Here's a series of articles i found on a website i frequent a fair bit
http://www.bodybuilding.com/fun/hale36.htm