Yes and yes, although I am probably an optimist.
The Mariners have added Jean Segura, Danny Valencia, Carlos Ruiz and Mitch Haniger to a potent offense that this year trailed only the Red Sox in wRC+ (the M's have subtracted Adam Lind, Nori Aoki, Dae-ho Lee and Ketel Marte).
Pitching was the problem with this year's 86-win team and the team lacks rotation depth with the trade of Taijuan Walker. Should the Red Sox trim payroll with a trade of Clay Buchholz? At any rate, I expect the M's to be in the market for another starter or two to go with Felix Hernandez, Hisashi Iwakuma, James Paxton, Ariel Miranda and Nate Karns.
Seattle GM Jerry Dipoto left the Angel farm system barren but many attribute the demise to Halo owner Arte Moreno. Dipoto inherited a weak Seattle farm system that has probably improved since Dipoto's arrival in September 2015.
I'm bracing for regression from probably two of Robinson Cano, Kyle Seager and Nelson Cruz, but I remain optimistic.