I'm going to disagree about the XL engine being a liability on the WT. If anything, I think it's better to put XLs on your lighter machines.
The lighter the machines are, the more probable that you'll be losing the 'mech to destroyed CT than crit hits.
And if you've lost an entire side torso, at 45 tons, you weren't long for this world, anyway.
XL engines are something I hate to see on heavies and up, but so long as it's a medium, and uses the XL engine to push into the red, it's the best use for them.
Agreeing with the LRM10, though. The standard Dragon is a bad design, The Grand dragon is horribly undergunned, but this light actually does the same job, if not better, than the other 'mech 15 tons heavier than it.
I'd have preferred seeing a SRM 6 in the chest, though. It would have made the WT a decent knife-fighter, and an anti-tank unit, in a pinch.