An even letter distribution is nowhere near a safe assumption. The second letter is going to predominately be a vowel, and some vowels far more likely at that
referencing a game (or other event) the defender is known not to have been present for is categorically unfair, as they would be hopelessly unable to guess it
They only get extra letters if that clue is passed. Then they get extra letters iff the previous letter was also the next letter in the defender's word
I'm gonna say we're not going to bother making a rule for this, because in practice it has, even up to right now, never made a material difference to a game. 'Nuff said. Moving on. (Please)
Like from here, the word most likely has U as it's next letter. It would make sense for a successful contact to reveal the U and the next letter (and possibly more)