I don't know if I'd say it is like 1e, but interesting. Keep in mind it is very short. The DM stuff is 9 pages, 34 pages of monsters with much blank space and a 31 page 'how to play' doc. I liked the defenses in 4e, but saving throws are back based on ability scores, which seems like a poor choice to me. I'm not sure how much it is appropriate to share in an open forum. The monster entries are interesting. Very short stat blocks, no skills or feats. Just ability scores, AC, HP (no hit dice), initiative, attack, special abilities, space/reach, speed and xp value. Alignment, Size and Type are at the top under the name. So even shorter than 4e much less 3.5e. The text below is more detailed than 4e, much more like 3.5 with ecology, tactics etc. I'd have to dig out some old books to make a comparison with 1e and 2e. It has been too long to trust my memory of such things.
Conditions remain, but very simple with very few numbers. For example Blinded says 'the creature can't see', 'the creature moves at half speed', and 'the creature has disadvantage (probably not allowed to explain this, but is a new very simple mechanic) on attacks'.
3.5 DMG says 'Blinded: The character cannot see. He takes a –2 penalty to
Armor Class, loses his Dexterity bonus to AC (if any), moves at half speed, and takes a –4 penalty on Search checks and on most Strength- and Dexterity-based skill checks. All checks and activities that rely on vision (such as reading and Spot checks) automatically fail. All opponents are considered to have total concealment (50% miss chance) to the blinded character.
Characters who remain blinded for a long time grow accustomed to these drawbacks and can overcome some of them (DM’s discretion).'
4e says:
BLINDED
✦ You grant combat advantage.
✦ You can’t see any target (your targets have total
concealment).
✦ You take a –10 penalty to Perception checks.
✦ You can’t flank an enemy.
Leif will be better able to tell us what 1e was like on this, but I'm guessing the idea was you know what it means not to be able to see why have rules for it. Okay, I'm pretty sure their were rules for light sources and I remember a mechanic seeing invisible creatures.
Anyway, the numbers light nature of the playtest document is what I wanted to convey. We had six very numbers centric entries in 3.5, 4 less numbers oriented ones in 4e and now we are down to three with only one implying numbers (half speed); although, disadvantage relates to dice.
You get a move and an action. However, if something is effortless and never requires a roll then it isn't an action. Examples of things that aren't actions include getting a piece of equipment from a pack, speaking, turning over a light piece of furniture, drawing a weapon and opening/closing doors (that aren't stuck or secured).
That's the things that jump out at me just flipping thru.