Things have changed recently. The Orcs are able to operate recon drones deep behind the Ukrainian lines and attack detected targets very quickly. There was nothing like that in 2022 or 2023.
Will their radars be "updated" as well?
As I've already pointed out a few months ago, the backbone of the Ukrainian air defence are S-300s and Buks. Patriots and SAMP/Ts are just an add-on. I clearly remember having told you that Ukraine expended 10,000 ground-to-air missiles in the first 2 years of the war. Where are you going to take another 10,000 from? Ukraine had 3 Patriot batteries, while one was destroyed. It's 1/3 of their capability. Let's say, the Western countries could deliver 3-4 more Patriot batteries this year, but there will be no more ground-to-air missiles left for the remaining S-300s and Buks. Are you aware of the fact that the West does not produce a sufficient number of ground-to-air missiles to keep donating them forever? The USA decided to buy a number of Patriot missiles from Japan, but their production (anywhere) is still very limited. You think about the number of equipment, while you don't take logistical problems into account.
How come you concluded that the perspective of having a couple of Western AD systems with a very limited ammo supply, but the existing ex-Soviet AD systems without any missiles left could make things better?
No matter how it works, RuZZia outproduces NATO in terms of the equipment used in Ukraine by a very large margin. Over 3 million 152mm shells versus about 1 million 155mm shells is the best example.
Who will protect them against RuZZian fighters that are equipped with more advanced missiles and have better radars?
Yes, if they are not destroyed the way you can see in the videos above.
I don't think so. A couple of Patriots that may appear or not with no ground-to-air missiles for S-300s and Buks is no improvement at all.
All Ukrainian power plants except for the nuclear plants have been destroyed. I hope you can understand what it means in terms of production and heating in winter.
The Orcs can do the same and they have a bigger supply of missiles.
Ukraine won't wait for years, as such a perspective is not viable. With power plants destroyed and no heating in winter, people will be fleeing to the West in bigger numbers. Who do you want to use to fight a war if your population leaves the country and gets killed?