Back to the original topic:

The missing ability to play friendlies takes away a source of income.

Also, the missing friends list takes away the ability to send gifts to friends, so ultimately it takes away a source for getting rest packs, skill points, morale boosters, etc.

Nordeus had just about gotten a pretty decent Top Eleven 2015 together after the latest update that brought back player compare, special abilities training, etc. so why do they keep introducing errors too?

It's as if they never test their releases. This error is evident on the very front page of iOS versions that do not connect via Facebook, so a very, very simple test case ought to have spotted this. Aaaaargh ....!