There's something to be said for the similarities in the numbers of jumpers that each of those teams take compared to the Blazers but look at their field goald % compared to the Blazers:
http://www.basketball-reference.com/leagues/NBA_2010.html
Given last year's anomaly with injuries, I think that a better place to look is the year prior to it - the Blazers are not bad at all:
http://www.basketball-reference.com/leagues/NBA_2009.html
8th overall in FG% and 4th in 3P%
Since you seem to be specifically looking at the Suns - there are two things that you need to remember about the Suns -
1. They have one of the best setup man in the league, in Nash, of course they are going to get good opportunities
2. They are mostly a veteran team, the Blazers in '08-09 were a very young team, one would assume their players are not as good, yet, at knowing when to take the shots and when not to do so.
But, again, if we actually look at the data without the filter of injuries or Barkley's entertaining but relatively groundless sound clips - the Blazers are not that bad, at all.
they may be taking similar numbers of jumpers, but they either have more talented shooters/scorers or they're taking higher percentage shots. The Blazers do shoot similar numbers of jumpers, but they maybe aren't especially good at hitting them? It appears that they rely on a ton of offensive rebounds to generate extra shots, which accounts for their relatively high offensive rating the past couple of years.
Well, of course, but if you look at the reasons they had such efficient offense - you must also consider their youth, inexperience, and lack of an elite setup man like Nash...
Overall, imho, the numbers come down to the fact that if a team wins 50 games with tons of injuries and because of it mid-pack defense - the offense is not, generally speaking, a problem or broken.
Maybe the real problem isn't that the Blazers are a jump shooting team, it's that they aren't a particularly effective jump shooting team (or at least not good enough defensively to compensate)?
Well, I think that a combination of healthy Roy, Oden and continued improvements of the other young guys - will mostly fix whatever "issues" were with the offense last year, and a combination of healthy Greg, Camby, Batum and Matthews - will very likely make this team a very good defensive team.
So, overall, Barkley cracks me up, because he is funny, but he is not very insightful, imho.