Maybe this might be true in rare situations, where you're trying to guard an area not frequently traveled by the enemy. I've seen plenty of games where 3 engies all rush in and place three level 1 turrets and they all get completely destroyed in seconds, where if they had pooled their metal and created one level 3 turret, it would have survived, or at least taken down a couple enemies before getting blown up.
Yes, but that is only really a problem in a couple situations:
- Start of the game when the first enemy wave is coming and the rest of your team does not hold them back.
- Just after having your defenses smashed and starting to rebuild.
But you also have to look at it as now, while you had 3 level 1 turrets and 3 engineers none of them had metal left to repair their sentries since they were busy building them. Also you had 3 engineers, that would be 9 level 1 turrets now.
However, that said i do agree that in the end it would probably not be as efficient at killing as a level 3 sentry, and would probably be easier to destroy than a level 3 as well. However, now that people are getting good at destroying sentries, I think 3 level 1's would instead work better at slowing down an enemy advance. Instead of just having to poke your head around a corner a couple times to destroy one sentry, you now need to poke your head around a lot to destroy three sentries.
All together, I would rather have this flame turret than 3x level 1 turrets.
Or, a new kind of turret that we could have 3 off, say a 1 gattling cannon turret, so instead of having 2 gattling cannons per Level 2 / Level 3, you now can build 3x Level 1.5 turrets that have a gattling cannon turret, or something like that.