Boo hoo, there was no real new weapons between hl1 and hl2, so I guess it shouldn't be HL2 ? I play shooters for the gameplay, not because I expect some new elaborate shit weapons. What a weak fucking argument. Look at the evolution of the Unreal and Quake weapon set over the years. Oh that's right, there hasn't been any. When their are changes the established community bitches.
I do agree that in no way are these episodes HL3, they are expansions, nothing more. Perhaps engine upgrades over time will blur the line a little but that doesn't make it a sequel.
As long as these things are moderately fun they are worth a measily $20. That's nothing. Maybe the cost will reduce the punk kids that ruin the multiplayer experiences for the rest of us.