LaLiga has been postponed indefinitely due to COVID-19, which has led to more than 12,640 deaths in Spain and over 69,450 globally.
Reigning champions Barcelona held a two-point lead over bitter rivals Real Madrid when the league was stopped, while Cadiz and Real Zaragoza occupied the promotion places in Segunda Division.
Stoichkov – who won five LaLiga titles and a European Cup among other honours during his time at Camp Nou – feels Barca should be crowned champions if no more games are played in 2019-20.
"If we see how the situation is, with the matches which have been played, it would be fairer to end the La Liga season as it is now," Stoichkov told Cope program Tiempo de Juego.
"Many teams could stay up at the bottom, there are a lot of matches left.
"They could leave the league as it is, have no relegation and the top two from Segunda could get promoted to have a 22 team league. Because they have also done a lot of work to win many matches."
Messi confirmed his intention to join Miami in June, after it was announced he would be leaving Paris Saint-Germain as a free agent.
The 36-year-old was officially unveiled as a Miami player on Sunday, and trained with his new team-mates – including Sergio Busquets – for the first time on Tuesday.
Al Hilal, one of the four Saudi Arabian clubs bankrolled by the Gulf state's Public Investment Fund (PIF), wanted to sign Messi, but former Barcelona star Stoichkov thinks the Argentine proved his priority is football, not cash.
"We didn't play for money, we played for love," Stoichkov, who was one of Barca's greatest players in the 1990s, told Stats Perform.
"This shows greatness. It didn't matter to me to know my salary or the bonuses, for me it was more important to play and that people value me.
"The agents take care of the other things. Messi comes to compete and play and he doesn't care about money because he loves football."
Messi confirmed he could have returned to Barcelona, though ultimately decided against the move as the Catalan giants continue to tussle with financial difficulties.
Stoichkov, who played in MLS in the early 2000s, was not sad to see Messi turn down his former club, with the Blaugrana legend suggesting a deal was never feasible.
"I knew that he was not going to return because of the way and the impact of what happened when he left Barcelona," he said.
"He wanted to stay at all costs to finish his career at Barcelona, but he couldn't.
"I didn't believe it, even though I had the opportunity to talk with him, with his father and his brothers. I, as a former Barcelona player and partner, have always liked having the best players and Messi did not deserve that exit [in 2021].
"Many people criticise him because he did not want to return, but they do not think about how he left.
"Messi has done something that few people would do, say that he was not going to return so that his team-mates do not suffer. This shows his greatness, because he could return but surely the president was going to have to lower the salaries of the players and cut other costs for this to happen.
"Messi never wanted a team-mate to experience those things. The claims that he did not want to return are not true."
