I know its only pre-patch. But, OMG i fell so squishy. I can’t live long enough to test anything.
What is it that you’re trying to test? Rogues are killing inside of a cheap shot right now.
I’m just trying to get a feel for the changes to Assassination and Subtlety. I’m dying so fast, all get in are few Shadow Strikes. With all the stuns, aoe and other crap flying around, It’s really hard to do much.
I’ve been playing Assassination in the mid-40s and it feels great, no idea what it plays like at 50 
I think every class is dying pretty fast right now lol. As a rogue I don’t really feel any squishier compared to my monk or druid. Staying inside a teamfight for too long will be deadly if you’re targeted regardless.
I’ve not tried Sin spec much since prepatch release but Sub has been really fun. It’s not quite the old Sub spec but it’s better than Legion and BfA. Sub is a single-target killing machine at the moment and can nuke people within the opener.
My opener so far has been Cheap → Rupture → Dance + Symbols + Cold Blood → Strike x2 → Kidney → MfD Evis + Drest → Strike → Cheap → Evis → Reaping Flames.
Anything under 18k HP is dead by the time Drest hits, the rest kills off most others except durable tanks.