[...]
less factions to chose from, bfme1 play style and no campaign. 
Edain 4.xy is currently "only" a BETA, the other factions will come in future. But it takes time to Balance such a great amount of factions with the most different heroes, units and abilities. Patience  

is there an option for the campaign?
As far as I know not in 4.xy in current state. 
can i change the way it plays back to bfme2? 
 Install 3.8.1 

  - but the Edain Team only supports the latest version. An alternative plan would be to change 4.xy on your own , but this requires advanced skills in modding and much time.   
 can i go back to 3.8.1 and somehow fix the campaign mission 3 problem? 
see above
- only "official" support for the latest version. The other problem is that the creator of the campaign is inactive. Maybe the campaign will be fixed for a future version of Edain.
 are you guys planning to add all those features in the future? 
sorry for rambling but i am a huge fan of the mod!
thank you!
There is no information about future developements aside from official announcements.
Annotation:
I am not member from Edain Team, so this is not an official information 
