Should Niantic apply a min CP level for pokemons to left guarding a gym?

“If you are level 20 - 30 you can only assign pokemon above 1500 or more.”
You do realise that you’re also stopping players from putting one of the best defenders as well?

No. Deal with it. C'est la vie.

Yesterday I fought a 2000 CP Pokemon at the gym and it was more fun than usual. However I don't think that any limits are necessary. There are lots of reasons why people can't put their best Pokemon in gyms, like they need them for raids or are in a hurry. Also don't forget that there are people who just started the game and won't be able to defeat any gym if all the Pokemon there are higher level. And, after all, we put Pokemon there so that they were defeated soon. No need to defend gyms nowadays.

I mean i'd rather fight a 200 cp pokemon than a 2k pokemo

Not unless they boost Shuckle’s max CP.

Bring prestiging back.

That might be nice. Spoofers here like to drop 6 low level mons in gyms here. A real pain for remote gyms with poor reception

Daft idea that makes no sense.

I find Blisseys more annoying than Pidgeys myself. Maybe Blisseys should be banned from gyms?

No. Put in every single low CP mon you want. I'll take it over a level 40 snorlax/blissey/chansey any day. Anyone would.

Real defenders might annoy some attackers IF they are fully motivated. But as soon as a guy stops and attacks the gym is lost cuz anyone can win 6 vs 6. Not to mention that motivation makes it even more easier and faster for attackers.
Why Revive the Blissey/Snorlax every time when u can simply throw away the dead Pidgey which collects the same amount of coins in 9/10 cases?

In theory, it would potentially be more frustrating for someone trying to take down a gym of low CP pokemon only to see them back to full strength after each cycle with others continually feeding them.

No but they should make it so people cannot gray gyms.

No, but they could stop actively discouraging high CP mon from being placed in gyms. Motivation has way too much influence on CP. Also, all mon should demorivate at the same rate.