I didn't list any of these people and one good season =! multiple good seasons. With Dickey there are age/performance considerations. A track record of success, not one good season.
By all accounts Dickey, Boni, Izy, etc. should have been better. There are certain players you can gamble on, depends on your depth at that position, confidence level, scouting, projections, etc.
It's 100% clear cut that they need to platoon Carrera/Valencia in LF until a better option is made available (i.e. Saunders or trade). Colabello is a bench bat or occasional 1B, otherwise send him to AAA.