No, it's mental.
Now you've gone even further by stating that Sigurdsson, Gana, Schneiderlin and Gomes are "proven to be not good enough".
Sigurdsson scored 13 premier league goals last year and has regularly hit double figures for goals and assists throughout his career.
Gana.
Gomes has won the league and cup double in two countries, won the Euros, and played in two Europa league finals.
Morgan is the weakest of the bunch you've deemed "proven not to be good enough", has 15 caps for France and has played a significant role in premiership sides that have finished 8,7,5. So he is a top 6 DM. To have this guy as backup to our actual DM is really not a problem at all. The guy has had his problems but seems to have come through them to his credit.
I'm not against replacing any of these players if we can get better, but your statement that DCL, Richarlison and Tosun (lol) are a level above, is ludicrous.