Any work must be evaluated and paid. Kradie has done some work for the community and I appreciate it. It’s better to make 500 non-unique maps for keeping the community alive than to make nothing. In addition, not all people are able to make unique maps constantly and systematically. So I don't understand why you condemn him.
Yes, I agree with others, all these maps are very similar, almost the same. I definitely wouldn’t play all 500, it’s enough to play 2-3 to form your opinion about the mappack. In general, I'd call them "neutral" in terms of layout, because:
1. I'm sure these maps are free of serious bugs and issues.
2. I'm sure the layouts are quite strict, not crazy as f..k.
3. I'm sure 99% maps of the mappack would be a good choice for a cup. I mean, that your opponent probably wasn't practicing any of these maps during days and nights before a cup, so you should be on equal terms. For example, this "banana" map is cool, funny and has a non-standard layouts, but this is the reason why I'd never choose it for a cup without an advanced agreement and practice. I wouldn't choose this map for a cup because of difference from the other "similar", "non-unique" and "non-imaginative" maps.
The arrows on a RR maps are important for sure. Honestly, I'm not a super experienced RR player, but half of the maps I've ever played had no arrows. In general, it's not a problem for me. In this case I drop a pen on the table near keyboard after each turn, that indicates in which direction I will go in the next turn. So I don’t need to be overfocused on the game and don’t litter the chat with arrows like "<>".
And a few words about 18+ maps. Overall I don't even pay attention for it, because I'd rather to be focused while roping and prefer to see where and how I fly, rather than at naked pictures. Although some of them are really vile and cringy.