Banjo:
I'm personally still opposed to FFG's idea that a Kill-Team would be used for any other than mission than killing the enemies of the Emperor (thier one perpose is cleverly hidden within the name) but so is our GM, which means that although their will probably be some recon etc, it will not be the focus of the mission and instead be a small prelude/interlude to killing xenos.
That isn't "FFG's idea", the Deathwatch have always been involved in all aspects of the xenos, such as investigation, searching for relics, recon, etc. In all the fluff on them GW have given to us over the years, that has always remained a constant.
If they did just only do killing things, what's the point in having a specialist completely non-Codex organisation for it, when a few specially tasked Chapters (such as the ones tasked with patrolling outside the Eye of Terror and securing the Imperium against raids from the Eye, or the chapters tasked with keeping the Maelstrom contained, or any other founding created with a specific purpose) would do the job just as well?
What you seem to be suggesting is taking away the only thing that makes Deathwatch at all interesting and worth roleplaying :/