Op my guess is you have not been pvping for very long, or you are new to mmos. Thy can not limit classes without DRASTICALLY increasing the wait times for wzs. Point two pvp is not pve. This means you can not line up your ducks in a row and count on victory. Nor can you calculate whos going to win or whose going to loose until the end of the match. This is pvp. This is also why many people complain about pvp more then pve, because people expect to go straight up the middle, and kill everyone on the other side. Instead what happens is the other players from the other team and up wiping the noob off the face of the planet.
As for smash give me a break. Ive pvped enough on my commando to tell you that smash is the least of my worries in the level 50 bracket. Now running into a stealth operative or powertech with fire, that is at the top of my mind to avoid. Oh and mercs too. Those rockets still hit like a tone of bricks. Ironic everyone used merc rockets as a reason to nerf grav round. Now that grav round has been nerfed the imps have free reign with rockets lol.
You probably have the best response I've seen in any thread about nerfing smash or about pvp in general. In all honesty the ones who complain are the under geared new to pvp players or those who have not spent time ripping and modding gear. You can't just get full ewh gear an expect to go out and beast it up. You have to learn how to pvp,strategy/tactics and all, and also learn how to get the most out of your gear. Hell..one of the top 5 biggest hits on my server was 10k single big hit from a merc. lol. I've seen plenty of snipers hit for 9k on someone. Granted those who were hit were most likely PVE geared players. But to the haters..go ahead and nerf focus spec, I have still done over 700k in dmg on Vigi spec for guardian so I am not worried at all.