I think its well worth the purchase, I do buy every year regardless though. I do roll my eyes at the haters who want the wheel re-invented every year, you won't find too many gaming companies that listen to their audience all year round like SI do. I don't think people actually understand how difficult it is to make this game, anyways.
FM18 probably wasn't their best year, they changed a few things, brought in a few new things like dynamics ect, first year for a new aspect is never the best. This year has made vast improvements to that aspect, the introduction to new training is so much better now, tactics has improved and the 1000 other changes for the better. I don't have any real complaints this year maybe except a few interface bugs haven't been resolved but there not game enders...... Skin, screens and interface are way better, use the dark skin.