Litvos
I did not mean to disuade you. I agree with the others that Hebrew easier than English.
Golfer
I peeked in a smaller dikduk book I have at home. It has 91 tables to conjugate binyan Kal alone.
Many of those exceptions are due to reasons you identify. But to make a rule that encompasses all 91 (and I have a bigger book with more) would be quite a complicated rule.
Of course, as mentioned I cant prove that there isnt a reason for the examples that dont have a reason as to why they are exceptions, but I fail to see how the existence of an unknown reason for an exception makes learning that exception any easier.
Finaly there is the classic story said to involve Rashi where he is said to have written:
.???? ???? ???? ???? ????