Not really
In my opinion Combat/Assassination is the way to got for leveling no other spec gives you the offensive/defensive/utility that you would get
Offenisve stats :
5% hit - Really mends the dmg lost to misses and dodges
5% crit
50% dmg to off-hand - Selfexplanatory
15% to eviscerate
Defensive stats :
5% dodge
5% parry
3,5 min CD on Evasion - That 1,5 min reduction has allowed me to battle multiple mobs more often
Utility :
Reposte - Disarm ,10 energy ,high dmg ,low CD...why not ?
3,5 min CD on Sprint makes traveling before getting mount that much easier
Blade Flurry - The Ability to kill 2 targets in my opinion is huge for a rogue not to mention its a dps increase with its 20 % increase in AS
Long Gouge - Allows you to use nearly a full bandage ,its basicly a pause to heal up which is always welcome and allows you to restealth in PVP
+25 energy after using Finishing moves allows you for better energy management as well minimizes the dps downtime as thats 1 less energy thick you have to wait
While Sublety has more cons for leveling
Vanish and Blind CD's are 1.5 min shorter - Great not only you will not kill anything but you will go through your reagents that much faster
20% dmg to Garrote
75% chance for 1 cp on Garrot
Armor Ignore is nice