I've been looking at some of the edges and and a few of them seem to be sort of worthwhile, and others do less than what might be expected.
As an example, my current character is kind of weak, so I got the strength of the ox edge, and it gave me a substantial increase to carry capacity. And then today, I was running a bit short on inventory space and had some RP points to spare, so I decided to get the well prepared edge. I paid 100 RP for +2 inventory items (increased from 44 items to 46), which is less than a 5% capacity increase (while strength of the ox was ~30% weight increase).
There are a lot of edges that seem like they could be interesting or cool or useful, but having to fork out up to 150 RP without knowing exactly what they do and then feeling like you spent a lot of time/effort for nothing just sucks. I just think it'd be a good idea if the edge helpfiles specifically stated what each edge does.
It is 5%, it's just rounded down to the nearest whole item. For comparison, the perk is +20% storage. For 100 RP, you think it would be closer to +10%.
I second having a bit more information on edges in much the same way we've got for perks.
They at least give you a vague idea for it. The edge for healing more quickly I think is worth it depending on your race and class. The one that makes you more devout with warcry and bless gives a great boost as well. Due to the taboo nature of things though I don't think they'll really change, but yes, +2 inventory slots is pretty shitty when a simple perk chosen on creation gives you a boost to them by +16%. The two should probably be switched to be honest, or at the very least the cost of it should be cut in half. The one that annoys me is the 5RP for each language lesson you try to gain, then you have to wait like 5-6 ticks just to gain another one. I wouldn't mind more information being opened up myself about them, as prior to learning them I didn't realize how useful any actually were. With the ones targeting the supernatural, it sounds like a Watchers wet dream, but after reading a possible bug issue about using one of them, it doesn't seem to really give much of any kind of boost which has had me hesitant to purchase them on any character.
But.... we gonna lose the "mystery"....
The "mystery" of the game might have held up back in the 1980's and 1990's because we're still finding out hidden things in games from back then even today, but in the world of today, games are becoming far easier to figure things out and in many cases solutions are just fed to the players of those games. It may make it so a very select few are upset they didn't find these out on their own, but when it comes to a text based game that's been out for nearly 2 decades now, the mystery just doesn't seem to be something worthwhile to guess about. Sure maybe have a period for changes like 6 months to a couple years at most for any "mystery" to remain so, but honestly mystery hurts new players more than anyone else. Even if everyone were spoon fed the exact mechanics of the game, a majority of the people would not be able to capitalize on it anyways. Mystery serves to only benefit people who know of them, not the players this game seems to claim to want to keep. Transparency has become a staple in the world today whether we agree with it or not.
I can see why the mystery is useful in some regards, but I think it detracts from the gameplay experience when you're paying hefty price with a hard-to-get currency and you don't even know what you're getting. Take stalwart of faith for example: it is more difficult to curse you. Is it 3% more difficult, or are you made resistant to curse spells? Is it a flat -5 saves bonus to curse attempts against you? If I knew it was actually useful, I would consider investing in it. I thought extra item slots in my inventory would be useful - no more "you can't carry that many items" for me - but I had to pay 100 rp points to be able to hold two extra items. 100 RP is a pretty big time investment, and the payoff was dismal.
Edges are not given through quests and they specifically tell you what they do (in most cases). Restful body gives you higher regeneration. There's no mystery what it does, but you have no idea if it's actually going to benefit you until you get it (+5 hitgain or +15 hitgain etc?). That's why I think it would be a good idea for edges to be less vague.