Don't get stuck on the "minion" issue. It's separate from whether or not removing the 1/2 level bonus is a good idea. Any 1st level monster makes the point just as easily in the present thread.
By removing the 1/2 level bonus, the DM's toolbox becomes more limited and monster distinctions become smaller. An orc hits as well as Orcus. The game takes another step in the direction of "vanilla". That's a good thing?
Orc minion lvl 4: +7 to hit
Orcus: +21 to hit
You were saying?
To sum things up, IMO it's a great idea to remove the +1/2 level bonus. The game already makes a distinction between low-level and high-level characters (combat-wise), which is:
- ability score increases (from +1 to +4 to all modifiers across levels),
- number of powers (from humble 4 to something like 15),
- everything that comes from paragon paths and epic destinies, which is a lot,
- damage (so not only you have more powers, they also deal more damage each),
-
hit points,
- feats,
- bonuses to attacks and defenses from feats and magic item,
- armor,
- gold and rituals it provides.
That is more than enough, we don't need an extra arbitrary and rather pointless modifier on the top of that.
Skills are another thing however and removing +1/2 could hit them. It's easily fixable but needs to be addressed.