Well our lineouts have been a majour cause for concern in these six nations. Davies and Gough being front jumpers was the problem I was bringing up. I've rarely seen either used as a middle jumper, and never as a back jumper. Now I know JT is an excellent lineout forward, and usually sorts out the middle with Ryan and Martyn takign care of the back. Charteris however adds a formidable lineout option (shows this week in week out for the Dragons) that would give us more options, and keep the oposition guessing.
It's all well and good thinking about grunt, but if we fall apart in the lineout (the most important set-piece), we'll struggle to get any ball in Frances 22. We saw this against England and Scotland, where we consistently lost our throws in attacking positions. It was a huge problem v England, as it forced us to take pot shots at goal from the half way line instead of playing for teritory. Against Scotland with 13 men, this was no longer a problem because we could attack from deep.
I don't think Charteris get's utilized all that well for Wales. He's not the main lineout jumper for some reason, whearas for the Dragon's he's the lineout caller aswell. He wasn't the right player to be paired with Alun-Wyn, as both lacked grunt, but alongside Gough or Bradley Davies, he's just what we need imo.