USSF D2 Power Rankings - Week 6

Time again for the USSF D2 Power Ranking (tracking all matches through 5/19 - including a trio of mid-week matches). Austin takes over the top spot, while Tampa Bay and Baltimore move up the charts. (W-L-D)

1. Austin Aztex (4-1-2) (Last Week: 3) - One win, one draw and 5 goals over the week moves the Aztex to the top of the rankings - along with the top two struggling. 
2. Rochester Rhinos (3-2-2) (Last Week: 2) - Normally a loss to Baltimore would be a worrying sign this season. However, Portland's similar loss and Baltimore's new form isn't the worst result.
3. Portland Timbers (3-2-2) (Last Week: 1) - Only one point from three matches over the week which brought down the early leaders back down to the rest of the pack.
4. Montreal Impact (3-1-2) (Last Week: 6) - Four points in two matches against their future MLS clubs - Vancouver and Portland.
5. Vancouver Whitecaps (2-1-3) (Last Week: 4) - A home draw, but their lead in the NASL conference could be over shortly. 
6. Puerto Rico Islanders (2-1-0) (Last Week: 5) - Hardest team to rank in this line-up having played on 3 matches when the average is 6 across the league.
7. Tampa Bay Rowdies (2-1-3) (Last Week: 8) - A good road victory over Carolina and a road draw against league leaders Austin, good results that they are hoping translate back in front of their great home crowd. 
8. Crystal Palace Baltimore (2-4-1) (Last Week: 11) - Victories over Portland and Rochester mark the biggest week of the season for Baltimore and 6 of the their 7 points of the year.
9. Carolina Railhawks (1-2-2) (Last Week: 7) - Struggling to find last year's form and about to start another long road trip. 
10. Miami FC (0-0-5) (Last Week: 9) - Five straight draws, Miami must get a victory in one of their next two home matches.
11. NSC Minnesota (2-5-1) (Last Week: 10) - The new club continue to fall and are almost at the bottom. Lowest attendance in the league and their next two matches on the road don't bode well for the immediate future. 
12. AC St.Louis (1-5-1) (Last Week: 12) - A point earned against the Timbers, but still the bottom of the league at this point, but that can be quickly changed.

What are your thoughts on the current power rankings? What changes would you make?