NO it is not. Jesus as much as this is posted you would think no one mains a TItan. On paper this sounds like a OP combo but if you play as a TItan you know it is not. Add in the lower TTK more ranged melees and more melee cooldown mods getting a shoulder charge is going to be even harder than it is now.
What you plebs need to worry about is the MK 44 Stand Asides. Plus there is other crap out there that beefs up the weak spots in a aggressive Titan build. Skullfort will be a waste of a Exotic for a properly setup aggressive Titan build.
With TTK as low as it is, the Stand Asides could be the difference between death and a OHK.
But look at the the perk
[quote]Grants and overshield when sprinting at full health with Seismic Strike, Hammer Strike, or Shield Bash equipped. Hits with these abilities recharge a portion of your melee energy.[/quote]
The recharge is about half your melee charge, and anyone who is starting a Shoulder Charge who is not at full health is a noob. But at full shield you can tank 2 -5 more bullets. That means around 2 more Hand Cannon or Scout shots or even a burst and half from a Pulse. Combine this with the Sentinel Buffs and yea I will be even more impressive than a Skullfort.