Should the assist timer be increased slightly?

I'm surprised this hasn't been discussed more lately. I remember a while ago (forget exactly how long ago this was), the assist timer was reduced for some reason, and I never really understood why. What's the benefit of increasing it? Often times you have a support or a top laner that engages a fight, but then gets blows up really quickly. But sometimes fights last so long that they don't get assists for the fights they started. So, I ask you, should the assist timer be increased slightly, or is it fine the way it is now? Personally I think adding a few seconds would be nice.

Another thing worth pointing is out is if you break a shield, you get no assist for breaking it. Unless you actually damage someone's health bar, the assist doesn't count. There have been times that I broke Yasuo's shield (didn't actually do any damage to him) and didn't get an assist for it. Should you get an assist for damaging/breaking a shield?