I agree with you. If a group gradually becomes stronger. Then it has a long shelf life. The way the Roma team has performed in the last two seasons is absolutely commendable. Their squad was not very strong. Still, they managed to perform quite well
Roma did not spend enough money to build up their squad and with this, having 2 final matches in Europe just within 2 seasons is impressive. They even could win the Europa League final if luckiness and referee stand with them.
I expected Roma to win the Europa League final. But unfortunately, they could not win. If luck was with us, maybe the Roma team would have won the Europa League. They managed to perform well in the finals as well. A small mistake made them lose.
I also had hope that Roma would win the Europa League this season but it's a shame they lost on penalties.
But at least they have performed quite well and are satisfying because they made it to the final to fight for the title against Sevilla.
For the Italian Serie A, Roma played not so satisfactorily, they even had to finish this season with only 6th place.
Maybe next season Mourinho can correct some of the mistakes of Roma so that he can perform even better in the several leagues he will be running.