People can like or not like how they are conducting business (or not conducting business, as the case may be), and form their opinions on their plans, whatever they may be.
What I think they are doing is trying to evaluate the roster from last year. There were so many coaching issues and injury issues that it's hard to evaluate it.
I think we won't see many more signings, mostly players after the draft to fill obvious holes that weren't filled through the draft. Hopefully this means that all of the good young players get to play and the Cardinals can evaluate for a year their progress and then take a real stab at Free Agency next year.
Do I like this strategy? No, but I see what they are doing.
Even letting Allen and Murphy walk has some merit. Allen is being paid now. Could Allen be a real bad contract in a year or two? Yes. He can't miss games and needs to produce a bit more to make up for his contract. I can see why the Cardinals wouldn't approach that number, but I would have. I'm a fan, not a manager of a team.
Murphy wasn't even the best Cardinals corner back last year. I'm a big Murphy fan, but if you asked me, do I think Murphy is a legitimate #1 corner, I'd say he probably never will be. Can a rebuilding team afford to pay a guy who is really just a good #2 corner the money that Murphy got? It's probably not smart.