That's a lot of progress for 1 year part time!
I would keep that tablet off the panel and mounted to you or your passengers leg. At your rate of building you could be flying in another year to year and a half, the tablet could very well be obsolete. Readability of tablets in the cockpit is another big concern.
Whichever EFIS you decide on deserves the panel real estate directly in front of the pilot (doesn't have to be centered, just first and foremost). It will be the instrument you stare at most. Regardless of the whiskey compass get the magnometer option.
I would keep the boost pump switch away from your start/master/etc, it is switched on/off multiple times during a flight where as the others are usually on for the flights duration. Once flying your left hand will be on the stick and all switches should be easily manipulated with your right hand.
Does the MGL EFIS not have a boost pump warning light?
Why the 7 1/2 amp starter breaker next to the start switch?
What wiring diagram/architecture are you using? I found my wiring architecture dictated at least a third of my panel layout.
For just VFR I wouldn't bother with a backup airspeed, if you really want a backup several manufacturers offer great mini EFIS's for the cost of 2 new airspeed indicators. If you really like the standby airspeed, pair it with an standby altimeter stacked to the left of your main EFIS.
I would leave the fuses (assuming your planning on ATC type fuses) off the panel and put them behind the panel somewhere. Reference the Aeroelectric Connection for why.
Leave the glove box off, way easier to add map/glove pockets on the side/kick panels.
Sit in your cockpit and do some "flying", plug in your headset go through all your checklist and find out what you like and don't like with your layout.
After my written checklist, before I take the runway I use my memorized flow check. It flows top to bottom, right to left takes less than 5 seconds and I consider it my best checklist.
Fuel desired tank
Alt air in
Elevator trim set
Carb heat off
Boost pump on
Lights as required
EBUS/aux alt on
Take your time, don't screw up and have some fun!