behaviour blocker != application control
Application Control can and will probably affect performance, depending on how optimized it is, since it needs to check vendor lists, move to restriction groups, and is connected with firewall and real time protection.
Where I said that behavior blocker is the same of application control?
I said that it isnt a core feature for antivirus solutions and it isnt that heavy on system performance, there are much more computational bottleneck in security solutions than an Application Control module, but, yes, behavior blocker can have a very detrimental impact on system performance.
You said that or at least inferred that ESET doesnt have an Behavior Blocker and that isnt true.
ESET could use the HIPS feature together with Live Grid (cloud reputation) to make a functional Application Control submodule, but they wont, because it isnt a core feature.
Ps: Not every security solution should be a clone of Kaspersky to be effective, I am a user of it and personally I dont care to enable Trusted Application Mode and dont care too much about Application Control.