OK the last couple dailys had lightswitch and I can confirm that you can still tank stuff. Beat up two stealth vandals just now in my bubble. I would also add that my Titan was my only alt to go through the daily easily and without dying. This build is my favourite right now.

I haven't tried it yet but I think you would have to play a lot more conservatively. I soloed the weekly heroic yesterday with this build and I had to go less "unstoppable beast" and more "lets pick off this thrall so I can get more shots on that knight". The build is actually suprisingly more versatile than I thought. Having the option to put on such a strong shield that lasts half a minute is very, very useful.

Eh, if you're the same level light switch isn't too bad. And then again mobs melee can be dodged pretty easily.

Not very well..lol