Mobility (Stealth) this skill would allow you to run faster and expend less stamina when sprinting, sustain less fall damage, perform evasive maneuvers like a dodge roll (not like the stealth roll, you would be able to do this one out of sneak mode) and backflip and parry incoming power attacks (blocking at the moment of impact) with a possibility of disarming or getting a kill cam attack (regardless of the weapon and shield used or lack thereof).

Martial Arts (Combat) an expansion on unarmed combat with three styles of martial arts taught by Khajiiti monks, Argonian guerrilla fighters, and the Renrijra Krin.

Mysticism (Magic) i know they took this out and reassigned spells to other schools but the magic I am suggesting doesn't have an (easily accessible) equivalent.
Magic used by the Psijics like reflect magic, reflect damage, dispel, and instant teleportation (no time passes when fast traveling but an amount of magic is drained depending on how far you travel).

Existing skill trees: spears, halberds and naginatas could be added to two handed while javelins could be added to one handed. They could be faster than greatswords and swords respectably and have longer reach but do less damage on average. The three perks could give the weapons an instant kill effect (5% 10% 15% odds).

I would like a Shout Skill Tree. I think that should have been introduced with Dragonborn (maybe).

Yeah that sounds good, allow you to strengthen shouts because they don't do much damage normally.

I mean on master difficulty.

It could also have new effects for shouts.

sorry about that. thanks for the link.

Can't read OP, due to the color of the text.

None the less...http://www.gamesas.com/topic/1432794-future-dlc-suggestions-thread-9/

Aside from Mysticism, I agree that there should be perk trees that affect mobility and hand to hand combat. How they didn't add either of those things is a major oversight or bad design choice. I mean things like sneak and skill just don't have enough depth to their function, imo, to warrant 2 perk trees.