there is no 'good' outcome for esa claimants at present, because the current government are trying to limit the time you are getting esa to 1 year only, irrespective of illness/circumstance (although it hasn't quite got through parliament yet - but it will). people will then only be able to claim jsa and dla (which change to personal payment thingies in the next 1-2 years also). in short, people with disabilities (particularly those with mental health problems) will have a much harder time claiming all disability related benefits in the future and you may have to 'fight' harder to keep them than you have done in the past.
the work related activity group means they think you are capable of doing some work at some point in the future. it also means you might get referred to a4e/another company i can't remember to go on stupid and patronising courses to improve your 'employability' regardless of your skills/education/past employment history.
those with mental health issues (like my hubby) are usually referred to this group even though he has a lifelong diagnosis and is unlikely to get better. they also like to threaten you with attending these patronising and insulting group activities/courses or they will cut your benefit to the £65 ish weekly rate. he worked as a civil servant for 10 years, is doing an msc and is extremely intelligent (more so than the stupid advisors he sees) yet still has to attend courses and jump through hoops to keep his benefits (the last one was a meeting with an advisor about doing a cv - which he already had - so i'm not surprised a4e are in trouble as i am sure they 'claimed' that as an intervention from the government and got paid for it!).
one thing i will say is not to panic (hard, i know, given all the changes going on described above), NEVER sign anything without reading it properly (or listen to them if they tell you that you have to....read the forms very, very carefully), take an advocate/friend/relative with you if you need to have an assessment/see the other agencies involved in esa/make decisions about your benefits and fight your corner. always remind them how your disability affects you at it's worst and don't let them bully you into anything (and from our experience they will try). e.g: mr kicker doesn't do groups (due to his illness and symptoms/presentation). we had letters threatening to stop and/or cut his benefits unless he attended and we had to get gp/consultant/medical assessment and appeal process to get this point across and not have him suffer/get unwell by doing group work.
in my experience, the people dealing with esa are a bunch of Finance Specialists who know nothing about disability (esp. mental health), make it as hard as possible for people to claim and the whole process is not fit for purpose. but....you can do it and get what is rightfully yours - but you need to arm yourself with knowledge before doing anything - and after 3 years of experiencing it through my hubby i like to think i know a little about what to do, so please give me a shout if you need any advice/help.
i wish you the best - please try not to worry as anything with disability benefit change tends to take ages so you can prepare and get what you need in terms of your benefits/support - but things are getting more difficult. i can also point you in the direction of other services/people who may be able to support you and ensure that things stay ok. but they are all bar stewards. x