On the Spy issues, I like Dark Prince's proposed wording change for the additional information it provides even though the current wording appears consistent.

On the Draw rule, I think we can ignore both repetition of position and moves that prevent that (e.g. a piece being revealed by a Spy) and focus solely on the number of TURNS without a capture. (Other approaches would hit the clause eventually anyway). As for the number of turns, I would suggest 60, but will happily go with a higher number if someone links a game that includes more than 60 and still resulted in a decisive outcome on the board.

As far as turtling, I again agree with Dark Prince's statement: "The fact that "turtling" is a well known and widely used strategy does not necessitate that rules do not discourage their use. On the contrary, rules are commonly used as a mechanism to deter such strategies. "

If one player wishes to sit back and do nothing but defend then, obviously, the second player can sit and not attack and a draw is the natural outcome. Letting a person not attack and then refuse a draw indefinitely seems sub-optimal to me.