I've yet to get a satisfactory response to my earlier assertion that, perhaps, Overwatch is supposed to be this good. I'm not entirely certain that anyone is denying that Overwatch appears to be broken, so I can't help but infer that there's a distinct possibility that it is supposed to be that good.
If we assume that Overwatch is intended to be this good, it does make combat seem rather odd compared to other RPGs. One of the most useful combat actions would be to wait and react to your enemies and hurt them when the standard defensive action would not be available to them. Granted, Overwatch doesn't work against high Agility opponents so its use is limited. However, that does make high Agility enemies such as Eldar almost guaranteed to get their Overwatch in before the character that triggers it and it could almost turn into an Overwatch pinata battle. If Overwatch is as good as it seems, most combats could just devolve into Overwatch and counter-Overwatch where possible. Combat would be incredibly static unless both players and NPCs mixed up their tactics, which in most cases would be inferior to just continuing to Overwatch. Even a straight up firefight in an open battlefield gives Overwatch plenty of benefits of standard shooting.
My concern with Overwatch is that there is nothing stopping you from using it in the middle of combat and the triggers can encompass almost anything that the player can think of and the only potential limit is GM fiat. Furthermore, the penalties of using it (can't use Reactions, limited field of fire, generally can't aim) don't seem that severe compared to similar actions like Suppressing Fire and compared to the bonuses it gets (denies enemy their Reaction, can pin, can interrupt). To enable multiple attacks with a single Overwatch seems to push Overwatch into broken territory and that's solely off the FAQ due to the relatively vague text in the book. Multiple Overwatch attacks is much too good for me. A single Overwatch attack still makes Overwatch powerful but not crazy broken.
Overwatch is so good, in fact, that no-one "under the sights" is going to even twitch for fear of getting blown away.
How would an enemy know they were under the sights? How would an Overwatch action look different compared to someone doing a Full Round Aim? Unless the enemies or the players get meta knowledge of what the other side is doing, there is nothing to signify that someone has Overwatched on a kill zone unless the character openly declared it ie. "Don't move or I'll blow your brains out!". Considering Overwatch kill zones are only limited by the 45 degree cone and the weapon's maximum range, how would someone know that an enemy 200 metres away had declared Overwatch on anyone poking their head out of cover? I understand that once the element of surprise is gone that enemies can flank and reposition but certain fights won't allow that (firefights in narrow ship corridors, warehouses, sewers, etc) and nothing prevents anyone changing their kill zone to cover the flanking attacks. And that's just for one character that Overwatches.
I do agree that Overwatch is really, really good and there don't appear to be too many weaknesses if you are engaging enemies at range.
Edited by Popdart