Personally I think the changes seem to be fairly positive and anything that brings data site's loot more in line with relic sites is good from a selling point of view although maybe not be from a lore perspective. Surely ancient sites with technology from the golden age of man would be worth more than data from pirates. Well, I guess it depends who's buying but that's how it is for another 2 weeks anyway. The loot volume of common high volume drops like Positron Cords is also also being lowered meaning you'll be able to carry twice as much crap as before but I think most experienced explorers will still leave or trash these items, especially in high sec sites as they're still pretty worthless and will probably be more so now that it's easier to cart more around.
Higher faction POS BPC drop rates and "Optimised" BPC drop rates are another change which I guess is a good thing although obviously more supply = lower prices but I doubt there'll be a massive influx of these items into the contract market. We won't know more until the patch hits though so maybe they'll tweak the rate too much and we'll be flooded with BPCs.
Lastly on the subject of just data sites; the addition of new faction materials is interesting. I expect the price to be astronomical (excuse the pun) to begin with until the market flattens and people realise they can't sell the finished products in which these materials will be used for more than the materials. Then again this hasn't exactly stopped drone or ammo production so why should it stop this.
All those wormhole changes from Hyperion are starting to make sense a bit more now with the addition of null sec data and relic sites appearing in class 1-3 wormholes. It seems CCP wanted to clear people out of low class wormholes or something so they can add in fun stuff for the average player to do and I expect the level of ganking will be through the roof for the first week or so. The fact that local is no indication of a wormhole's residents will probably make covert ops players godly as they gank all the intrepid explorers in search of their fortunes. Either that or people will realise they're easy targets and not bother in the first place. My money is on the former though... too many people just aren't that careful.
There was more to that announcement but escalations and career agent changes are a story for another day. However there was another announcement, this time on the forums (I'll update with a link once I find it again.) Stealth Bomber changes are coming and the community is pissed. Now I've only just gotten myself into an SB so can't comment much but it's relevant to what I'm doing at the moment so I'll throw in my 2 cents (although neither the country in which I live, nor my country of origin use cents as currency so that could be an indication of the worth of my comments)
So bombs will now take 12 seconds rather than 10 seconds to hit. This change seems to benefit people who are semi afk and will give them 2 seconds longer to tab back into the game and watch as their shields disappear. Is there actually any point to this change? It's not major but 10 seconds seems to me to be plenty of time for someone who's actually paying attention to get out of the way or shoot it. It's probably tied in with the second change of bombs having less hp meaning one smart bomb can take them out so the extra 2 seconds gives smartbomb users time to release their own bomb before yours is too close...maybe.
The change people are whining about most is stealthed ships will now decloak each other when within 2000m (including people warping through you)which makes organising bomber wings a pain in the ass. Or at least a pain in the ass for anyone that is a real person. It's been pointed out in the replies that this change is because of multiboxers using programs to run stealth wings, but the program can actually warp all of the accounts in at different ranges with no mistakes. Real players on the other hand make mistakes. And one mistake from just one player can mess up the entire warp and get everyone killed. Now of course it's not impossible to organise but it seems like a lot of effort especially when you can't see your fleetmates while they're stealthed. Personally I'm not convinced this change is a truly needed one. If stealth bombers are so prevalent why do I only rarely see them? Oh right... they're stealthed.
Well, that's it for now. Time to go fly a bomber while it's still viable (yes that last part is sarcasm)