Hrm, Valencia is being used as a yardstick here?
IMHO, Juve is different from Valencia/Deportivo etc in many aspects so a direct comparison isn't so accurate.
First, the players. In our first 11, its true that Juve does have some of the absolute best footballing technicians around. However, although the good are really good (DP, Thuram, Trezeguet and to a slightly lesser extent, Camo, Nedved and Davids), the bad are really mediocre. Hence, the overall 1st-team technical quality seems inferior to the Spaniards. Football is a team game. To play a possession and fluid game like the Spaniards do, all-round technical ability is a must.
Secondly, apart from general technical ability, the kind of players Juve have? I believe the midfield (particularly the central) is the most representative portion of a team's style. The 4 main players in Nedved-Davids, Tach-Tudor (surprisingly) are the backbone in the central midfield. The Nedved-Davids duo certainly have the technical ability but are more of kick-and-rush players ... ball bringers and runners. I'll use ZZ as the reference here and its clear that do not have the kind of composure that characterized the vintage 96-98 versions. Tach-Tudor are a poor-man's version of Deschamps-Jugovic et al. Not only are they lacking technically but also in terms of organization and influence. What our central midfield excels in though is a high-powered game, built on pressing space and forcing chances instead of creating through prettier play. This, I believe, is why Nedved was bought not to replace ZZ and his kind of play but instead to alter Juve's midfield gameplan.
Lastly, different leagues and differing mentality. Spain plays a more open game. Even the smallest teams try to attack the biggest ones by seizing the initiative. Valencia's/Deportivo's styles are a reflection of their league's characteristics - their technical football thrives in that environment. It is unrealistic to expect Juve to adopt that kinda style with the likes of Brescia etc. The Serie A environment is highly tactical and nothing is left to chance, the very element that is fundamental to the free-flowing style everybody likes. Obviously, exceptions exist like AC Milan but look how we dealt with them at home?
Hence, I would like to think that our difficulties in doing a Valencia/Deportivo are a mixture of all 3 areas instead of any one in particular. For this season at least, I don't think Juve will be radically changing their current gameplan since it'll probably do more harm than good. The January transfers will not be too revolutionary in personnel, I fear. All in all, it raises another issue - does Juve suit tactics to players or vice versa in formulating their campaign gameplans? Looking at the rather old age of all our key players, I'd say there is a very good chance of an entirely different style of play next season or the one after next.
Otherwise, I agree with what most others have posted about the team's weakness and suggested buys, hehe
Just my humble opinion!