Your initial post was not clear:
You should had been more specific to what was boring. This let us to believe, his entire game was boring.
Using drill + Factory in early game is not boring, but if you need to play like that all throughout a game (like in a mutation game) than I would say that is boring. But his early game play shows, he had to delegate many different things producing SCVs, moving svcs from mining minerals to gas, building supply depots while moving his factory and pointing his laser. This part it’s not boring, I know because I do this on some of my games, quite a lot of actions in that duration.
Yes I agree, they are costly and fragile. This is why I don’t use or I don’t use them well enough.
The second to third wave Fear handled those waves with only a few cyclones with one top bar ability? He also handled the second and third set of shards without massing them. I guess he’s had practice with them to use them properly.