contrary to this, it is unlikely that sevilla can afford any major signings with the clubs financial standing and yes, getting champions league football does not change that position. it is left to see if sevilla are able to get quality loan signings, else they would struggle with relegation like the just concluded season
It's difficult to fight in the Champions League when a team doesn't have high-quality players, but in the season that just finished Sevilla were still able to stay in the middle area of the final standings and it's not that close to relegation. But for next season Sevilla will have to fight even harder because they are already in a tougher competition apart from La Liga, because the Champions League is a league for the best teams from several domestic leagues.
The Champions League is, as its name suggests, a league for champions, the greatest teams in Europe. Sevilla had a pretty bad season, but winning the Europa League earned them a spot in the champions league next season, and with this, I believe they will also prepare ahead, am sure they will want to improve and add more players to their squad. Any team playing in the champions league will make huge preparations towards it. Due to the multiple competitions they will participate in and the fact that it will be a hectic season for them, they will require a more diverse team to cover for fatigue and injuries.