He is not a targetman for sure,he is a powerhorse who is better coming from behind and the world cup showed that with him providing Cavani and Suarez is a system similar to Barca's but his role at Atletico is different, even Aguero have more freedom than him,so he can play as a number ten or as a line leader where he will do a job better than Bojan and Villa in that role,he may not be Drogba in the hold up,strength and heading but he is far from being bad in those
The team coped with the abscence of Xavi,Puyol well this season but sruggled with the absence of Messi and Pep tried Villa,Iniesta,Afellay as a false deep foward with no good results from them so Forlan can be either a Plan A as a direct replacement for Messi or as a plan B with his presence in the box,anyway dont know who would make a better signing Drogba or Forlan but the team will not sign anyone from them