The Powerfly 5 would be fine for riding you plan to do ie exploring forest tracks and forest roads. For MTB park riding you would want to go up a level or two in spec.
One thing to try is bike with dropper seat, you will need to do an hour or 2 of riding to get hang of it. They were designed for MTBing when you need to lower seat for steep descents to lower center of gravity. They a also awesome for day to day road riding, drop seat when stopped and put both feet flat on ground, also nice when going downhill on road. Once you've had one there is no going back.
Its no problem to fit one to Powerfly5 but check out cost as it may not cost much more for bike with dropper seat that will have higher spec, suspension, brakes and gears.