Just played through Cavacom RDC beta, as I didn't see a newer version or it in completed courses.
I'm not a judge and am just giving my impressions. Of course, you'll have a major expert in Ben (b101) with his play through, if he hasn't already.
1. Good hole, but the planting, while detailed inside each circle would have felt better if there was plant variety and spread out more to use the open space.
2. Good hole, although the left back slope seemed extra severe, but at least the pin was fair despite that.
3. Sculpting on the green side of front bunker. From what I've seen on tutorials it should be sculpted flatter. Didn't affect my shot, but could depending on other pins.
4. Hole played fine with wide fairway and huge green. Perhaps a little bit more of breaks, as most of the green was flat. Also, I won't keep mentioning it for future holes, but the circle planting of the same plants with little items (rocks, other flowers inside, etc) was repetitive and didn't leverage the variety one would expect. Spreading the planting out with various plants and heights will make it seem less plain. (Note: I know you've put a ton of work into this and just want the course to get it's just due) In some ways it would be better to use less obvious plantings, if you're going to do it the same way on each hole.
5. Green was lacking planting and much of fairway too. (see above)
6. Liked the biarritz green and played shot into slope to kill speed and made 11 footer for birdie. Two suggestions: flatten the left and right sides of biarritz slope, so shots would go into sand and not severe bounces. Look at some images online of biarittz greens to compare yours with how others do it. Also, the rest of the green needs some sculpting as it's completely flat.
7. Only feedback is that you have a lot of huge bunkers and breaking them into a few smaller, spaced out ones would make the holes look more life-like. For example, the huge bunker in the back of this green is sculpted nice, but breaking it into three different sized and spaced bunkers would make it look like a real hole and not one in a game.
8. Clearly a three shot par, but no real risk at hitting the ball in the right rough. The bunker across the water doesn't really come into play. Consider opening landing area up way more and move bunker to tee side of water. It will make a player try to hit full driver and get water in play. I hit 3/4 driver into rough, slash two shots on green. Also, besides the severe slopes on left and right sides the rest of the green is flat. Need more subtle undulations/breaks
Not much to say about 9 & 10 and got distracted on #8 and these two taking a business call.
11. Another huge bunker that breaking it into two would look awesome. Also, green is flat
12. Flat green. Doesn't need to be covered in yellow and red, but look at other courses and see how designers use the fuzzy brushes and raise a lower heights a few inches to get the extra breaks, etc.
13 & 14. Sparse planting and appears to be a lot of auto-gen trees and bushes
15. This is a solid par 3 and great sloping. It seemed like some variety of plants and bushes would make it pop even more. Liked this hole a lot! Also, your paths are well routed, etc from what I could tell.
16. Routing of this hole seemed a bit strange, since unless it plays into a heavy headwind the play is driver down the right side across the creek. If you want to prevent that then plant some more trees, etc in that area. I think I know what you'd want to do, but this turns into a pretty easy play, but could be much more difficult.
17. This could be spiced up by putting a few more gently slopes in the fairway. There is a great tutorial by MayDay91283 on randomizing a plot.
and using the spinning brush technique he shows could give you a little more randomized sloped on your fairways.
18. Pretty basic, drivable par 3 and there should be more risk than hitting driver into a big, flat green.
There is A LOT of great here and clearly you've done a ton of work on sculpting and putting in cart paths, etc. I think the circles of planting takes away from all your work and doesn't leverage the wide open, unused spaces fully. Please take my review as just one players and new designer. Congrats on all the work you've done and hopefully you could find a usable suggestion above.
Looking forward to seeing your finished product. :-)