Instead of players count or percentage, guild benefit percentage is more from PC. Guild prestige, how hard trying from mobile, cannot match PC gaining prestige from GvG. As a assumption, Even if mobile has 80% of players in the same guild, cannot overtake what 20% of pc users can do in the same guild.
Likewise, GBG battles also much faster in PC if you have an extra device to click click click.
Mobile version gets the update very late when compared to PC. Sometimes even after a year it won't come. Just for an example, production menu auto zoom removed in PC but mobile not received yet. Don't know it will happen or not.
One satisfying point is, mobile screen and buttons are not like (very small in) PC.
After all this, still liking to play the game in mobile for my own entertainment and relaxation.