Imo invasion ahould be changed. Its sad to see people have 50k bots out, imagining how long they had to sit there for almost a week and press the same sequence of buttons over n over again.
I used to plat StarWars Galaxy of Heroes and there was smth like the invasion in DH but the team boss the guild had to defeat was VERY strong. So each guild member could attack once with their heroes to contribute in killing the boss (or rancor in SWGOH). Of course stonger members could contribute more.
I believe this would not only help save time of those invasion pros, but also be smth fun and different to work on as a guild.