Ace already was on the leave before the european promo tour, they had to keep the fact hush hush because of the record contract they've signed in 1980, a very much profitable contract, where it was requested that the band should have had at least 3 original members.After the elder costed so much and then it bombed, Ace leaving would have had changed the terms.Ace went on the promo tour for friendship/ financial reasons.The group tried every way to convince Ace to stay,to avoid a financial disaster.When Ace officially quit,and after kKss sued their record company obtaining only a pittance of what they asking for,Polygram demanded the contract to be renegotiated.Just imagine, you pay an absurd amount of moeny to buy Casablanca, make a dea with one of the most popular bands in the world,you give them carte blanche for the new record-hoping that they will come with a hit record to burn the charts with, pay lot of money for the recording sessions , and then they got MFTE

.Yet you have no choice but promote it.The record bombs, your deal ties you to the band and then -of all things- the band sues you for shlocking records.Raw deal, for sure.
Kiss were hoping that Ace would have stayed ,yes, but when it was clear that he didn't want any of it,they were forced to audition a new guitarist.Meanwhile the band was recording both the "killers" tracks- after a specific request from the record label- and the "cotn" albums.The auditions were taken during the recording time.Ace was asked back during the tour, to no avail.
Of course, since all this info came from different sources, please take everythign with a bit of salt like you need to do with every statment and interview from any of the band members.Thank you.