Opinions was asked, so here's my subjective input:
It's a lot, but the dreaded wall of text(™) attempted avoided. ^^
Only 40% IP refund on previously purchased runes? Feels like they're low-balling it.
70% refund, and I could be game.
As for the prices:
The Urfwick cost seems reasonable. Somewhat. I mean, it IS a "high-value" skin (at least the community seems to think so), so I'm having one either way. Though a 100.000 IP price-tag would be...better.
75.000 IP for a Gemstone is a big "NO!". I've estimated the value of 1 Gemstone to about 40 EUR on average, judging by various RP spending streamers, and 75.000 IP is worth more than 40 EUR (~7125 RP, directly translated with EU RP bundles).
Perspective wise (wize?):
75.000 IP = almost 12x 6300 champions (600 IP short).
7125 RP = 7x 975 RP champions (300 RP left over).
You should get more value for RP than IP - not the other way around.
50.000 IP for a Gemstone, tops. And frankly, I'm sick of these imposed purchase limits.
And personally, I think so far only the Gemstone exclusive ward skin feels like something worth the price anyway.
I don't play Vayne, I can't tell the Annie skin apart from some of her other skins, and Darius feels underwhelming and rushed to say the least. But I am a Support main.
On the other hand, "exclusive hero icons" (whatever that is), that is something - if it is what I think it is - I'd be willing to spend more than 3000 IP on.
Still, at 3000 IP, I'd get a few. But I'd be willing to pay 5000-10000 IP on such an icon to "show my devotion" to certain champions and appreciation for certain skins (if skin splash icons would also be available).
The Rune skins:
I dunno what happened to the previously mentioned Runelord Volibear (not to be confused with the existing Runeguard Volibear), but without at least seeing what the IP exclusive border looks like first, it does feel like sort of a rip-off. Especially as all of those skins are fairly old.
Exactly why I don't have any of them, though the Volibear skins has tempted me on occasion. At 35.000 IP, I'm having it anyway, but 20.000 IP would feel like a more reasonable cost for a 975 RP skin (~10.000 IP for the Skarner skin - there should be a "cheap" option too).
Runeguard Volibear
RP 975 / 30-Apr-2013
Runeborn Xerath
RP 750 / 05-Oct-2011
Earthrune Skarner
RP 520 / 09-Aug-2011
Rune Wars Renekton (made legacy - and thus oh-so wurf - due to its oldness)
RP 975 / 01-May-2012
As for the Mystery ward skins and icons...yeah, I'd spend quite a bit on some of those.
And I already got a list of Chromas I want (so far, 26 of them). Prices seems reasonable.
Lastly, I got a suggestion of my own: A new IP exclusive skin to celebrate.
"Stay awhile, and listen."
Considering some factors, time passed, time since last skin, skins total (5 in this case, + Classic), the meme-value and roles that has gottten skins lately, I suggest...
Runelord Zilean
His last skin was back in 2015 (Blood Moon). There are no skins currently or recently released for a Support.
This would be a commemoration of those of us who has been here for a long time (and Zilean has been around long too - one of the original 20, in fact - and "he's an old man now").
Q: Spews out the icons of runes upon detonation (after all, they are getting removed soon).
E: Uses the image of a random quintessence as clockface.
R: (Well, this one's a given - and has meme value) use the icon of the quintessence of Revival (seriously, who has used this rune, ever?).
Dress him up a bit. Like one of those poker-players, whose suits are covered in cards, we'll get a robed Zilean, covered in various runes.
This skin doesn't have to be a complicated one. Tech-wise, 750 RP / 975 RP equivalent, tops. But only available for IP.
50.000 IP, 100.000 IP, 150.000 IP, whatever. Maybe free, or even limited, to those who has been here for 3-4+ years.
Personally, I'd much rather have this than for example Earthrune Skarner with a fancy loading border.