Kroft will compete for snaps alongside/behind George Kittle, which means a reduced role for the veteran. Kittle's injury history does put Kroft in play as a waiver wire pick-up during the season, and Kroft has had the most success amongst the remaining tight ends with the 49ers.
CIN TE Tyler Kroft - 2018 Fantasy Football Outlook
Because of injuries, Tyler Kroft started all 16 games and caught 42 passes and 7 touchdowns in 2017. The touchdowns made him a surprise fantasy stud. With Tyler Eifert's injury history, there is a good chance Kroft will get more opportunities.
Eifert is the starter which means Kroft will enter the season in a backup role. There are also questions about the Bengals offense and their effectiveness.
2018 Bottom Line
Kroft should not be drafted unless you have a deep roster and want to use him as a collar for Eifert, but that isn't really recommended for the tight end position. Kroft has little value unless Eifert misses time due to injury.