Scallops go well with tarragon - bake dotted with butter and tarragon and pepper for 5 - 6 mins. Or with a garlic sauce, or with some cajun spices and grilled for 2 mins, or with a lemon marinade as you tried, or with honey and dijon mustard,
or cook on skewers wrapped in a parma ham or jambon de serrano, or steam with fresh ginger and chilli,
or with vermouth/martini and lemon - cook scallops and deglaze pan with vermouth and lemon juice and some zest, Add a 'light' herb - dill, parsley or tarragon, reduce sauce and pour over scallops.
1000 suggestions to keep you happy
here as well in case you get stuck