I just received my beta key this evening, and have been on the beta dueling and horde hunting in the jade forest for a few hours. I took wild charge, cenarian ward, typhoon, ursols vortex, and king of the jungle.
Feral druids on the beta are the absolute most insanely hard to catch, fun, amazing to play spec ever for escaping dicy situations in a world pvp environment. Despite not having feral swiftness, I was still 143% in cat form vs the 149% speed we have on live. I did not even notice I was slower. Even better, with the glyph of prowl I went 136% in stealth (should be 150 actually due to elusiveness but it is bugged on the beta at the moment). I had the boot enchant, which now stacks with our speed w/o swiftness. Our abilities such as savage roar and dash actually increase our speed moreso than on live by about 15% multiplicatively, making us faster when we need it.
The extra speed we have when using these abilities combined with the little hop we get in travel form to leap forward, ursols vortex, and typhoon, and being able to stealth while in combat while using king of the jungle make us very very good at getting away. Typhoon is a great ranged interrupt if you can aim it well, and I have not yet gotten to play with the fae silence glyph. I doubt it'll be as great as it sounds though because itll cost ya 3.5 seconds worth of globals to use.
Bear form has always been our survival mode in pvp. This has not changed too much on the beta, and bear still feels pretty tanky as feral (not guardian). We have retained the ability to use frenzied regeneration, which now has no cooldown on it and lasts 6 seconds total! It ticks on my druid for about 9k per second, and consumes 10 rage per second. We generate rage now by white hitting our opponent rather than being hit, but the rage we generate seems to be enough to almost continuously sustain this. I have been almost dead in duels and whatnot on the beta only to go bear and sit there frenzy regen'ing and white hitting my way back to full hp. Our bear lost a chunk of stamina and survival instincts, but we are still a royal pain to kill when we want to be.
We now need to keep savage roar up in pvp. That combined with our loss of the free ravage on feral charge cat make me feel very energy starved when I open on an opponent. I enjoy the luxury of having full bleeds up on my opponent on live before they even get out of pounce provided they do not trinket the open. On the beta, it takes longer to ramp up and energy seems to be harder to come by. I feel that I will probably want to respec to crit over bleed mastery to generate combo points faster to help alleviate this. We seem to hit quite a bit softer as well, but you can't look too much at the raw numbers as this is a beta test. Our wrath and starfire hit insanely hard though. My wrath in full cata feral gear hits 10k! Unfortunately, mana seems to be an issue for us and I'll cover that in the next section.
I feel this was the price we have had to pay to get such a mobility increase getting back disentanglement at level 90. It is honestly what I wanted. I enjoyed using savage roar in wotlk. I honestly feel it was them removing savage roar from the pvp rotation in cata that actually got our root shifting removed in the first place because.
Feral druids on the beta are running on fumes almost continuously from a mana point of view, but that may just be my playstyle. Our heals cost 4k to 5k apiece and our mana pool is exactly 20000. Shapeshifts cost 740 apiece, but there is a glyph that reduces shifting costs by 90%. I want to try this glyph out and see if I feel mana starved still, but I have not been able to find it on the beta yet. I feel our heals may be a tad too costly atm.
Feral heals hit pretty hard on the beta. I get 20k non crit healing touches, and cenarian ward ticks three times for about 7k apiece without the 20% increased healing glyph. Rejuvination ticks for 4.4k every three seconds without this glyph as well, and now has a tick right when cast.
Overall, I'm having an absolute blast on the beta as feral. I feel really mobile and fast and just druidlike in general. I love it! I can not wait to get symbiosis and disentanglement to add to the fun.
Ursol's Vortex was insanely amazing. There were so many times entire raid groups of 5-10 horde were chasing after me, entirely stopped by one well placed vortex. The ability is so much fun!
If you have any feral pvp related questions about my experiences on the beta don't hesitate to ask.