Final revised workout plan (need critique)

[Aggression]

This is my second thread regarding this topic (my workout plan) but I have been doing some research (along with actually working out) so please understand I am not trying to be a pain but I'm trying to get this right.

This is my final revised workout plan. I have been working out on trial-and-error for the last 5 weeks. This is what I have come up with. I'm 24 years old 6' 220.

Day 1 Mon

Seated rows
Wide grip overhand lat pull downs/Underhand lat pull downs (alt every week)
EZ bar wide grip preacher curls/Incline dumbell hammer curls (alt every week)
Close grip upright rows
Seated dumbell shrugs

*Wide grip overhand lat pull downs and EZ bar wide grip preacher curls go together
Underhand lat pull downs and Incline dumbell hammer curls go together

Day 2 Weds

Squats/Deads (alt every week)
Leg Curls/Leg extensions (alt every week)
Standing calve raises/glute reverse Hyper-extension (alt every week)
Kneeling cable crunches
Cable side bends

*Squats,Leg curls,calve raises go together
Deads,Leg extensions,and glute reverse Hyper-extensions go together

Day 3 Fri

Incline/decline dumbell press (alt every week)
Front barbell lat raises
Tricep pushdowns (alt grip every week v-bar,rope,underhand,etc)
Reverse flys
4 way neck machine

Most exercises (except for the two I will list) will be 4 sets, reps of 10,8,6, and one last set to failure (about 4 reps) all while increasing the weight each set.

The two exceptions will be deads which I will do 4 sets, reps of 5,4,3 and one last set to failure (about 2 reps) all while increasing the weight each set. And the 4 way neck machine which I will do 4 sets, the first three sets will be of 10 reps and the last set will be to failure (still trying to get 10 reps) all while increasing the weight each set.

I will change my workout (exercises, order of body parts, etc) every 6 weeks.

Some questions I have:

1) I'm doing 5 exercises a workout. Is that too many? Will I be overtraining?

2) How do my sets and reps look?

3) Can I make good gains in size and strength with this workout?

4) Is it good that I am alternating every week doing squats one week than deads the next?

5) Is it good that I am alternating certain exercises every week?

[Aggression]

I will also be doing two rotator cuff exercises 3 sets reps of 15,12,10 all while increasing weight, after each workout.