actually, par in ball golf is generally defined as the number of strokes for a given hole that a scratch golfer is supposed to hole out in.
5+ years ago you could almost make the conversion of a 1:1 ft:yd reference comparison for ball golf and disc golf, but that gap has widened now. a 250 yard drive in ball golf is equivalent to ~400' drive in disc golf, which is more like an 8:5 reference comparison.
putting is what has usually skews any further comparison and what is the cause of inflated par.
in ball golf, the stat for the PGA card carrying touring pros is that they make ~19% of their putts from 18'. according to the 8:5 conversion, that "equivalent" length in terms of tee distance is 9.6', but we all know that even the most rec players generally make way more than 19% of these.
the mentality of putting in DG is way different, as is the actual performance. while a ball golfer lays up on a 30' putt, we are nearly always running 30' putts, and with good putters, a good chunk of these are going in. what i see is that what ball golfers do from 30' (get it close, maybe go in, usually not, but always stay close) is what scratch disc golfers do from 70'.
in disc golf's pro ranks, there's basically 5 types of putters, with the extreme ends representing a very small percentage of players.
1) bad putters (make less than 50% from 30', make less than 60% from 25' and in)
2) average putters (make 50% from 30', make ~70% from 25' and in)
3) good putters (make 60% from 30', make ~85% from 25' and in)
4) great putters (make 70% from 30', make ~95% from 25' and in)
5) insanely great putters (make at least 70% from 30', make at least 95% from 25' and in, but the insane putters usually separate themselves by making 25% or more from 40-70' whereas others will be lucky to hit more than 10%).
if you take the range where the array of tour card holding PDGA members, i would say 40-45' is about the range where the make % will be around 19% (it could be slightly closer, like 38'), as this is a range where i think the mentality begins to equate the 18' ball golf putt: give it a run, but stay within 90% make range on a miss (~6-8' for a ball golfer, ~18-20' for a disc golfer).
most ball golf greens are well over 50' in diameter, so only a small circle becomes the gimme range. in dg, the gimme range is much larger but the greens are often yet smaller. the idea that makes sense is that a 30' ball golf putt is closer representative to an approach shot in dg (maybe 100'?) where it's random if it goes in, but you want to pin it.
basically, imo, this removes a lot of the need for two putts calculated into par. if you have a 150' wide open hole, you SHOULD be able to get within 45', and good players SHOULD nearly always be within 30'. where scratch ball golfers are unlikely to get within 6-8' from 95 yards, it is quite common for a disc golfer to get within 18-20' from 150'. to me, this turns a 150' disc golf hole into a 1 drive 1 putt hole and a par 2.
i believe par should mean something as it's part of the key to legitimacy for converting a game to a sport. yes, the true average scores often calculate out as a decimal, but if the entire pro field averages a 2.16 on a hole (which is an average rating much lower than 1000), it should be rounded down. however, a good course will also have a true par 4 (average > 3.5) to cancel it out.
a lot of this is from a chip in my shoulder from early on when someone would say "what do you shoot under par?" and i would say "i usually shoot +2 to +5" and they would be like "wow, you must suck." they didn't take into consideration that my home course had a WCP/SSA of 54 and theirs a WCP of ~40.
most pros i know go into rounds looking at the available birdie opportunities and i believe there has to be some way to differentiate a course that has 5 deuce opportunities vs. 18 150' wide open holes.