I see no problem with the guy's strength, I mean, Ents tend to be more vulnerable to indirect strategies, like conditions, archery (heavy archery, that is) and/or swarm. Also, let's face it, barring skirmish shennanigans, when a companion hits around 12-13 strength he won't lose skirmishes unless the FP player plans to do so anyway, so what's the deal with 15? Could've been 18 and it wouldn't still make a difference, really. VERY seldom a game situation would arrive that the 15 strength would have THAT impact.