You want pvp to be more easy and allow noobs to gear and have a chance to compete?
Upgrade 1/5 get item
Upgrade 2/5 1400 rating or 100 arena games won this season
Upgrade 3/5 1600 rating or 300 arena games won this season
Upgrade 4/5 1800 rating or 600 arena games won this season
Upgrade 5/5 2100 rating or 1000 arena games won this season
This would also fix the boosters problem as noobs would just play more and eventually get full gear.