Any 2 players with coordinated supers can probably pop the bubbles and kill the titans

Yeah, as long as the titans are taken out, the setup dissolves... But if you noticed, they had multiple bubbles. Through coordination, you might be able to take our 2 def, 3 at most but as long as there is one bubble left, they can survive for that bit. The single titan can FoH his way directly into the center, punch right into the nucleus and take out the heart right there, at which point the rest of the fireteam could use there supers and finish off anything left standing. A DfA perk would be too risky, he'll be shot out of the air mid move. Maybe some special grenades might work? Flashbangs and ability denial ones perhaps...

I think the biggest point that should be taken way from this is it gives classes more defined roles in pvp. It makes players think instead of just mindlessly running at each other with shotguns. The people arguing for a nerf are only arguing to nerf the titan.

I understand and respect all angles and sources that inherently rule the battlefield. If this was reality, I sure as hell would endorse it. But this being a game of deathmatch, I can see the exploits positive and negative cons. Most gamers playing an FPS desthmatch just natually assume its nothing but run an gun, for the most part they are right. But in destinys case. Its much more, Supers are the game changers. I would be lying if I said this was not cool. Something like this was bound to happen. But, the main point that your showing about crucible, how its just repetative run in gun is doom to happen again under this exploit, soon everybody will want to try it and then you got fireteams on both sides of the river doing it, nobody dying and all kinds of supers smashing into bubbles. Then folks will be, hell no I'm not going in there, bubbles and infinite supers rule that land and now a huge player base is literally cut from that play list as a result. Looks fun though.

That's assuming this becomes a common thing you see randoms do which you won't. Itl only ever happen when playing a skilled group.