With cdr items Tryndamere's E (his spin) is on a mere 2 or 3 second cooldown, which devastates every other heroes movement speed. Especially with the fact that he can use this as an escape over walls much like flash.
Furthermore, Trynd's Q heals him for an extreme amount, regardless of his fury when built in this fashion. This results in an unreal ability for Tryndamere to be a tank in fights without any tanking items.
As a top lane, he is ungankable if CDR is built first. This needs to be fixed.