I personally believe Constructs could use some sort of boost, however I think it is redundant to make it simply an improvement in stats. If you look around my thread: "Frostgrave Ideas", I present a lot of ways I think Constructs could be improved upon.
In general, I think Constructs should be configurable, with fluid stats, and weird, specific abilities. When an artificer or a battle engineer in the fantasy universe creates an automaton or a construct, it generally is for a very specific purpose, and has very specific functions. You could create a variety of interesting constructs by embedding spells, potions, magic items, or even altering (not upping, altering) their stats (like lowering a large constructs health to improve it's speed) and so forth.
I don't think constructs should be based on power, but utility.
Thank you,
Like Clockwork