OK, here I am again, posting my suggestions for Gondor which no one really cares
About Merry and Pippin, these two are scout heroes for early game and kind of get a battle role for late game after they get their armor upgraded. For now their final ability is basically identical, I think we could change it a little bit:
(1) For Merry, his final ability is aimed at hero or other single unit, which is appropriate for him since he proved to be a capable warrior on Pelennor and did backstab Witchking
(2) Pippin's final ability could be a little different, it could be aimed at a location nearby a friendly hero, Pippin will jump there, knock over all enemy units near that hero and only deal moderate(maybe slight) damages, however the hero will recover and move 15% faster for 5 seconds after Pippin jump nearby. This ability is designed to be a support ability to save heroes who are badly injured on battlefield and ensure their survival. After all Pippin does save Faramir in the book and support Gandalf in the movie(battle of Minas Tirith).
Also I have been thinking about the disguise ability of strider, Merry and Pippin, for Merry and Pippin, the Lorien cloak is a ability for scouting, they just remain still in the wild to provide vision. For strider, I think this ability should be a little different. He is a experienced ranger and could hide himself if he wants to. And he doesn't use the Lorien cloak so this ability shouldn't hide him forever. Moreover, as a hero killer, this ability should be somehow related to the battle instead of scouting. My suggestion is,
(3) Strider's disguise ability: Once activated, for 5 second strider remain invisible, after that for 10 seconds strider remain unseen as long as he remains still. Once he end his disguise, all enemy units near him(small area) lose 15% defense for 5 second. This enables strider to ambush enemy heroes and enhanced his hero killer aspect.
(4) Strider's knife throwing, I think this ability could also be modified a little: it could only deal very limited damage if its target has green health bar, the lower health the target has, the higher damage it could deal, by this way we could make this ability a good "final strike" aiming at enemy heroes who attempt to flee in the battlefield