I am very disappointed with two different aspects of the Battleground which have many of my guild members (mostly mobile players who are supposed to be the target audience of the BG) voicing their intent to avoid or only minimally engage in the Battleground.
First, although we are a very active and successful guild in the GE and were consequently placed in the Gold League, we only have a total 11 members. However, we are paired against guilds that are 3 to 5 time larger than our guild which provides them with a distinct advantage (see comment below regarding attrition). Although this may eventually "work itself out" as guilds will be reassigned based on performance, it seems that the postings related to this issue in beta are still ongoing (I remember how long it took for Innogames to realign the neighborhoods a number of years ago). The future match-ups in the BG should be based on guild size (similar to the GE) so that each guild has relatively the same number participants.
Second, since the number of battles needed to conquer a province are relatively fix (unless a guild adds a special building), combined with "attrition," this tends to place smaller guilds at an extreme disadvantage even fighting against larger, less active guilds. It simply becomes a question of math: 100 battles per sector divided by (the number of guild members x ~40 fights/negotiation per member). The only real variable in this equation is the size of the guild (assuming guilds have the same percentage of active participants). Unless Innogames realigns the leagues based on size (and then activity of the guild), and/or eliminates attrition so that smaller guilds can leverage their very active members, the BG is really geared toward large guilds.
BTW, this is only the second or third time I felt compelled to post a comment to the Forum in almost five years (next month) of playing FoE across multiple worlds.