Throws are fine the way they are. How fucking easy do you want them to be. There is already a large input window just don't hold block. If it gets nerfed many characters will become unviable. Maybe allow the block button but you should guess between forward/back throw.
Many things counter throw, low profiled, jump, walk back after poke, U3 wakeup, duck.
Then on top of all that, you get a second chance to tech it. Many characters lack the tools that the top tiers have and it's thier only mix other than a low, taking away throw guess will make it worthless so any scrub could tech on reaction.
Wonder why no one bitched about the 50/50 throws in X? Suddenly it's a problem now!