We are just planning up our first Rogue Trader game, and I chose to play an arch-militant. My plan was go melee with a poweraxe and carry a shield off-hand to deal with parries; which would eventually be upgraded to a powersword.
However, the more I read of the system, the less am I convinced thats a really good idea. WS costs more than BS, and hitting once for 1d10+14 at P7, while sounding nice, probably isn't better than a Stormbolter on full auto landing 4 hits - or rather, 8 - at 1d10+7 P5 each, not to mention tearing. Plus, melee talents are gained significantly later, or aren't gained at all, or demand actions where you are giving up parry.
Could someone maybe share their experiences on whether melee militants work well, and if so, how? At the moment, it just seems like an inferior option to me, sadly.