This post contains my general outlook on the current state of the RIs, and what should be done to fix them.
General Opinion
The new way of doing Ris is great, it should be specific to each player, however, the extreme nerf that was done to the RIs should not have been to the extent it was. The main idea of the update was great, but the huge nerf done was not needed to the extreme that the update brought it to. However, the "Instanced" part of the RIs is great, and will help and allow for people (especially newcomers) to get ores. The stone that appears after you mine each ore should be also be mineable, and should just regen faster. The dispersion of ores should also be fixed and brought to something similiar to what it was in the past. IE. Gold/Iron should be in the side caves, and the tougher to get ores, such as lapis, diamond, and redstone should all be in the main caverns. The buff to redstone is a welcome change, as redstone was previously something that was quite difficult to get.
Garama RI Summary
This RI I spent the most time at (about 30-45 minutes), out of the three. This could be attributed to why I found the RI the best out of the three. I got around 1.5 stacks of diamond ore, 1.5 stacks of gold ore, 2.5 stacks of redstone ore, 1.25 stacks of lapis ore, and no iron ore or coal ore. This was probably the best out of the three RIs, and changes should only apply to Gold, Coal, and Iron. These three ores need to be more common on the island. The sidecaves used to be completely full of gold, iron, and quite a bit of coal, and now, there is almost nothing. They need a major buff, and should be similiar (but worse), to the way the old caves were. Diamond, lapis, and redstone should be moved exclusively to the main caverns, and shouldn't receive any major changes. Their quantities were quite understandable, and at what they should be. The other ores (coal, iron, and gold) should also be present in the main caverns.
Ascalon RI Summary
The Ascalon RI was right behind Garama in terms of the ores I got. I spent around 30 minutes at this RI and got 30~ diamond ore, 1.5 stacks of redstone ore, 1 stack of lapis ore, 1 stack of gold ore, 20 coal ore, and around 20 iron ore. This RI needs buffing to almost all materials. Iron, coal, and gold should be more common (gold should be less than Garama). Lapis ore and redstone ore are at what you would expect, and diamond ore should receive a buff. Again, iron, gold, and coal should be more in the side caverns, whereas lapiz, redstone, and diamond in the main caverns. The main caverns should also feature iron, gold and coal, but to a lesser degree.
Kalros RI Summary
The Kalros RI is by far the absolute worst RI as of now. I got 20 diamond ore, 1.5 stacks of redstone ore, 1 stack of lapis ore ore, no iron ore, no coal ore, 40 gold ore, and 4 emerald ore. This RI is absolutely horrible, to say the least. There needs to be way more diamonds, more emeralds (possibly less diamonds, but more emeralds), A bit more lapis, more iron, more gold, and more coal. This RI is also in lack of a large side cavern system (unlike Garama or Ascalon), so, to be fair, there isn't much room for iron, gold, and coal there. That's why there should be some side caverns added that are icy, sprawling caverns that surround the entire main caverns. These would include lots of coal, a good amount of iron, and some gold. These resources would also be apart of the main cavern, alongside emeralds, diamonds, redstone, and lapis. Again, ores exclusive to the main cavern should not end up in the side caverns.
In summary, the new system seems nice on the surface, but there just aren't enough resources to justify going to the RI anymore. The RIs need a buff (not to the degree it used to be, but to a lesser extent). One of the larger changes that really made these not worth it was also the respawn time of 20 hours. If the RIs don't end up getting an ore buff, at the very least this timer should be 3-5 hours to promote going to the RI more than once per day. This would make PvP more common amongst people going, as you would have to go during more popular hours. Another idea would be to reward people who spend more time at the RI during a single trip, or making their next trip more profitable based on how long ago they went before that. This would promote people going back to the RI, spending more playtime on the server, and allow for the RIs to make sense with their current ore counts.