Yep, you've surmised correctly, Petros, she's a well burdened little cruiser. She's easily twice as hefty as a other 17' LWL yachts at 4,200 lbs. and her D/L of 380 and SA/D in the low 13's suggests she'll do well in trade winds, and storms, but not much else. In her defense, she does carry a 38% ballast ratio, which is respectful for her general class. She'll track like a freight train, but backing down will prove a challenge, except to the prop walk side. She's built down quite a bit, so with heavy angles of heel, she'll lose most all of her effective lateral area. She should have a comfortable motion in a rough slosh and the forefoot is cut back enough, that tacking will occur with reasonable confidence.
She's a bit small to be considered a blue water boat, though easily a cat. B, but she's better suited than many coastal cruisers. Your Folk Boat will be a faster and similar companion, but your Hunters and Sanbel will eat it up on every point.Speaking of a comparison, your Sanbel has a 17' 10" LWL and displaces about 1,400 lbs., half the D/L and nearly twice the SA/D, so . . .