This Dortmund squad is fun to play and should be fairly realistic (give or take).

Tactics:
Its a 4-3-3(5) with a false 9 and a custom position for Reus (RAM).
The Preset on Defense is Pressure on Heavy Touch with about 8 Ticks on Depth and 4 Ticks on Width.
The Preset on Possession is 4 Ticks on Width so its a bit more narrow and 8 Ticks on Players in the box. The Corner and Freekick setting is 3 out of 4 Ticks but thats just my personal preference.
Player Instructions:
Both RB and LB get the Instruction to push forward as you want them to play 1-2 passes with your Wingers.
The False 9 also gets the Instruction to play as a False 9 so he drops back a bit more.
Playstyle:
As the preset says you should try to play possession Football. Try to search for your false 9 and play with him alot as he is one of the key parts for this squad. On the wings you should try to play with your fullbacks. As i mentioned they should be used to play 1-2 passes. Alot of times you get room in the build up to send someone deep dont be scared to do that sometimes. With the wingers or fullbacks you can often cut inside and than towards the baseline to pass to one of your players in the box with a flat cross.

Transfers:
Players to Sell: Rode, Schmelzer
Rode doesnt provide much value to the team in this formation and his Rating/potential isnt the best.
Schmelzer is in my opinion not the best choice as a LB and with the Addition of Tierney he wont be getting much playing time.

Players to Buy: Hazard, Tierney, (Giovinco)
Hazard is a very flexible and solid player. He doesnt have the highest potential anymore but he is instantly a solid player and can play almost every attacking position in this formation without a problem.
Tierney gives the squad another option for the LB position. Hes a young player with a good potential but at the same time already good enough to help the team immediatly when rotating players.
Giovinco is a complete optional choice i just like the idea of him playing in this league. In my Head its a nice little story like Raul at Schalke. I wouldnt give him more than a 1 year contract tho.

The goal of this Squad is for it to be fun but at the same time having something to be excited for in the future. With youth squad players + the already excisting good potentials on players like Sancho or Akanji make this a very fun team to play in my opinion.

(Maximillian Philipp is missing but he is also a good backup for almost all attacking positions. For some reason i cant find him in the Squad Builder)