Flatten attack bonus

[haran.banjo]

Ok, this is maybe crazy, I need a few comments and I need to start a constructive discussion.

I went back and forth reading a lot of posts about removing Item Enhancements altoghether. The most interesting has

been this one:

http://www.enworld.org/forum/4e-fan...-how-i-broke-up-item-dependence-bad-math.html
(below you can find the relevant part)

1. Masterwork armor does not exist.

2. Weapon/Implement Expertise, and any future feats that grant a constant bonus to attack rolls or defenses, are not allowed.

3. At the third and seventh level of each tier (3, 7, etc.), PCs get a +1 enhancement bonus to weapon/implement attack rolls, weapon/implement damage rolls and all defenses. They also get a 1d6 critical die at these levels, which does not stack with the critical dice of any weapon or implement they might have.

4. At the first and fifth level of the paragon and epic tiers (11th, 15th, etc.), PCs get an extra +1 level bonus to all attack rolls and all defenses. When a character wears heavy armor, this bonus doubles for the purpose of AC.

This is absolutely brilliant. However, it did not satisfy me fully.
What I plan to do is in fact add a more drastic change.

What will happen if I made ALL attacks use the same flat bonus for all characters?

I'll try to explain myself better.

Proposal:

ATTACK CHANGES
1) The Attack roll for every attack is Level + 2. This supersedes Enhancement bonus, 1/2 level bonus and Attribute score bonus.
2) Remove Weapon Expertise and Implement Expertise feats.

DAMAGE CHANGES
3) At level 2 and every five level thereafter (2, 7, 12, 17, 22, 27), PCs get a +1 enhancement bonus to weapon/implement damage rolls. They also get a 1d6 critical die at these levels, which does not stack with the critical dice of any weapon or implement they might have.

DEFENSE/AC CHANGES
4) Masterword Armor does not exist.
5) At level 2 and every five level thereafter (2, 7, 12, 17, 22, 27), PCs get a +1 enhancement bonus to all defenses and AC.
6) At level 13 and 22 the PCs get a +1 level bonus to AC.
7) At level 16, 19, 25 and 28 they get a +1 level bonus to AC only when wearing Heavy Armor.

A 5th level Fighter will have, with every attack he makes, a +7 bonus to hit, no matter how high his Strength score is and what weapon he is wielding.
Every other bonus is accounted. Weapon Proficiency, Flanking, Fighter Weapon Style bonus, the party Cleric's Lance of Faith, etc.
Keep in mind also that if an attack has a line - Hit: Str + 2 vs AC - this means that you still have to add +2 to the hit roll!

The Attribute score bonus is used for whatever else. Damage bonus, feat requirements, etc.
A 4th level Cleric with STR 14 and a longsword using Righteous Brand will roll a +9 (+6 for level, +3 for proficiency) vs AC, deal 1d8+3 damage (+2 for Str and +1 for level enhancement bonus) and will grant an ally a +2 bonus to hit (his Str bonus).

How heavy will be the impact of such a change to the actual gameplay?