This is a personal thing in my opinion. If the system makes sense to you and is up to code there is really no need to change it.
Draw yourself a schematic of the electrical wiring and then take a hard look at it and decide for yourself. You will get 10 different answers here...you should decide for yourself.
For most people here, this question might look very simple. I have searched for a while the different forums to see if I could find threads on this topic but with single-word search, it was difficult to get the result I am looking for... therefore, I need your help. Please do not hesitate to forward me to an existing thread if easier.
My new boat is equipped with the standard 2 batteries (crank & deep) with a switch and an electric panel. It appears that the switch only serves for the engine starter and engine area ventilator because everything else is directly plugged to the deep cycle battery. I can shut off all equipement from the panel (except engine starter, ventilator and bilge pump). The charger which can manage two batteries in a 3-cycle mode is also directly plugged to the batteries.
Is this standard or acceptable? If not what should I change?