My friend, you are getting into the real play. Ah, yeah, I forgot to warn you about the T comsat, it's a huge problem when they do it. Besides, they can build more than one, and potentially cover the map. But this makes this element equal, because P have Pylons, Z have Creep, so T should have static observatories too.
If you are already in Platinum - are you? - there I think it's all about feinting and micro. For example the Z feint building Roach W., and then don't make roaches. Meanwhile the P masses units to counter roaches and is gotten surprised.
Now with the new patch 11, there are some major changes, for example Infestors can Neuro-parasite air units. I wonder if it's possible to obtain control of a flying T base, but probably not, cuz it's not a unit. It would be cool to capture their main cc with Infestor.
I wish my pc had at least 1GB RAM (it has just 512mb t_t), and I didn't have to rely so much on hdd pagefile. Then, then each time the game starts I wasn't going to be necessarily the last one to enter the game, and always starting with (at least!) 10 seconds delay. It's seen in all of the build orders: opponents build new units at 0:01, I build the earliest after 0:10-12. And during the game it's all very low FPS, so I can't really even SEE some of the subtle movements. There's no way to micro the attack of units with delayed attack (normally, you should move them around, while waiting for the attack to reload); also no way to carefully save units while in battle - move the injured units backwards or burrow them only, to regenerate. This is huge advantage, if you do it, because you don't easily lose units.
So, unless this game motivates me to buy a new computer (%$@^*#$&!) I'm gonna have to retire soon; reaching the optimal levels possible to play with such machine. Ofc, I still have a lot to learn about how to play well with T, P and R. I'm mostly still playing with Z.
Ahh, not to mention additional advantage if the resolution is higher, because some important information is better visible; for example when you select and assign a group, it shows you the exact number of units in the tab. Well, this number is almost unreadable in my 1024 resolution. /and if the res is higher, pc is kaputt/