I think that Is more or less the opposite of my experience - I always wanted more:
against combo you want to close games after having disrupted your opponent
against Control you want hast threats that are hard to "Swords"
against creature matchups you want creatures that cannot be blocked (especially not by TNN)
If you read the post above I more or less argue for more Smashers, so I am entirely not on the same page as you. I also played 4 Smasher this weekend in colorless Eldrazi and it is very often the one thing you want (
Swiss Legacy Cup)
On the other hand the Angel is a very solid creature and IF you want to play other creatures please play a:
a) flyer
b) good blocker for Delver
c) creature that provides value with Blade Splicer / against removal
d) creature that is good against Miracles (flash)