Uh … I don't think it's as clear cut as you think.
The problem is, how do you determine--and, during competition, who gets to determine when the playing area is "clear"? If 20 sec into the 30 sec clock a chipmunk saunters across the fairway, does the clock reset because the playing area is no longer "clear"? What if it's a chihuahua? a golden retriever? a deer? a moose? a grizzly bear? a tumbleweed? a dust devil? a piece of paper? a player on a different card? What about a spotter parked in the middle of the fairway or on the edge? or in OB? What about a camera crew? or spectators? a streaker? LARPers? What if the spotter [camera crew/spectators/LARPers] moves out of the line of thrower's sight but leaves his/their stool and beverage cooler in place? What if they set up in an area where they would have to move to avoid interfering with the flight of a thrown disc? What if they're spotting/filming/spectating on a hole that's adjacent to the one the thrower's on? The point being, deleting "and free of distractions" from the rule does nothing to address the underlying issue; it merely shifts the locus from "distractions" to "clear" ... and you know darn well that players are going to argue it. So, at best, removing "and free from distractions" from condition 4 merely shuffles the deck chairs on the Titanic.
I would also argue that moving "after" from the main clause to the first three conditons and adding "during which" to the fourth condition makes things worse, not better. The root issue in the current rule, and which the proposed revision does not address, is if--and if "yes," under what conditions--the 30 second clock ever resets. Given that the primary definition of "during" is "throughout the course or duration of"--which is the way "during" is used elsewhere in the Rules and CM--in the absence of a clear restriction to the contrary, the presumption must be that the thrower is entitled to a full 30 second interval in which the playing areas is clear.
And, no, 3.02 does not solve the problem because a throw made within a 30 second interval during which the playing area is "clear" cannot, by rule, constitute an "undue delay."