Its not forcing me to do anything. Id never have Leia on defence anyway as shes far too useful on offence and can be quite comfortably be taken out by SEE when on defence in 3s and a non GL counter in Bane for both. As for GLAT on defence she is in the top 4 for hold percentage thats good enough for me and Rey I will just stick down as I don't need her on offence. In this scenario Rey on defence is fine as she averages quite low banners even with sub optimal teams unless Leia is used and if Leia is used having Ezra is pointless as he is 1 shotted.
Essentially once you have every GL and are only working on new stuff GAC is a matter of efficiency as 9 times out of 10 my opponent and I will clear each other as we have all the tools to do so,
Yes some will still use him from what I see (and do) it is only players who dont have GLAT who use him with Rey. It makes no sense to **bleep** a good banner stealing team in GLAT (average with Ezra 42 banners) at that level. If my opponents does that I'll just roll over Rey and Ezra for max banners with Leia and take out GLAT without Ezra with Light side Mandos and get max or close to banners for both teams.
Its not CG forcing a meta, its players and what they have available doing that and in your case if your issue is that you are "forced" to use Leia on offence then thats only an issue if you haven't got a deep roster.