When it comes to Sonic Forces’ soundtrack, a lot of people seems divided about the use of synths in nearly all of them. It’s definitely a very strange and sudden choice from the usual soundtrack in most Sonic games. In one way it sounds like Sonic Runners’ OST but most of the Forces’ OST use a lot of synths instead of bass.
The thing I noticed is that is not the first time the Sonic series has done this. The first time Sonic Team used synths to this extend was in Sonic Unleashed’s Eggmanland.