Well, actually, yes, it is a crying post. Why not? When tanks cry, sneak is nerfed.
As about SG - with 10 PE and 10 Luck u deal like 90-110 damage crit in eyes, if the rifle is regular. 223 pistol or 14mm is fine, but fits only to specific builds.
As I suppose, SMG now lowers sneak skill for 100. This makes holding SMG in hand-off useless. So u cant be affective close-range sneaker if u use it. Yes, u still can develop like 223 spammer, or use HtH weapon. But if u use EW pistols, u do like 60-160 damage. And get a lot of KO with a proper build. This makes half-way there, ur opponent has 220-290 hp normally. So u have to finish the job. If u are not HtH, that makes u use something to simply hex, coz u can always make your SG to 100-120 with books, even non-tagged. And if SMG affects sneak, u cant do this. Keeping SMG in inventory is problematic for short ranged fights, u cant afford dragging it out, coz u need to react fast.