The Ms have several quality position players at this point (offense+defense+speed). Most of which are going to get better. The only true holes in the lineup at this point are 1B and DH.
It also makes you wonder how bad the pitching staff has become?
The Ms have finally built their team to the park (Lefty hitters, speed in OF) and at this point I think changing the dimensions would do more harm than good. This is the only year that the Ms have had such extreme home/road splits and will likely turn around.

The biggest issues with the offense are once again 1B and DH.. Theoretically the 'easy' positions to fill. This offense is nearly solved.
Jaso in particular isn't the player type to suffer from Safeco (hes a good fit), and hes actually hitting for power with more BBs at Safeco. I wonder if hes just more selective at home? Probably a good adjustment once the BABIPs normalize.

I said before that Safeco was designed and built in the heart of the steroid era, when shortstops were hitting 30+ HRs. There were 17 seasons between 95-04 at 30+ HRs for shortstops, SIX since and none more than 35. CF? 38 in that decade, 15 since.
Overall, there were 356 player-seasons between 1995 and 2004 with 30+ HRs, 187 since. We haven't gone a full decade, but the HR totals are still falling. What Safeco was designed to create (a fair park for pitchers) has been compounded by unforeseen elements (the marine layer and LF wind off the Sound) and by the removal of roids from the game to skew the park FAR out of the bounds it was designed to create.
For a long time I've been an advocate of leaving the Safe alone, but we're gonna need to do something.
The question is, of course, do you trust all your young pitching to be good enough to get you wins in a more hitter-friendly park? Does changing the park now undo all your efforts to get LH hitting and good-defense outfielders?
I'd just move the fence in a dozen feet the whole length of the outfield and let your lefty advantage stay, but more and more it looks like something should be done. If the park breaks your young hitters and teaches them habits that mitigate their upside, how is that helping you? If no free agents will come here because of the tough park, what then?
When it was BUILT Griffey and A-Rod complained about it, and they're two of the top 5 HR hitters of all time. No more of those are coming along. You just drafted a RH power catcher who will be park-crushed as well.
Assets are assets. Devaluing your offense to help your staff can be a non-starter, especially when your pitchers can still get hammered at the Safe. Do Hultzen, Paxton, Walker, Erasmo, Pryor, Capps et all REALLY need the Safe at full offensive-crushing impact to be good pitchers?
If not, then do something for the offense. Prince Fielder is not coming here. We have no top-tier offensive help on the way, nor huge-average slap hitters. The Safe will cut down the Catricalas and Franklins of the minors too.
It might just be frustration, but I've come around on the fence issue. The Safe can be made less secure against offense, thanks.
~G

It comes down the best way of maximing your advantages. If moving the fences in makes your offense 7 OPS points better and 13 OPS against worse, then you've lost production.
So you'd have to analyze where we are on that scale of maximizing the current roster's production is. Where are we now on that scale and where do we need to be?
Presently the offense+defense is actually far ahead of the SP IMO. Most of the core position players fit the park well, either than Montero. Our best position player prospect in AAA is a lefty.
Personally not sure how good Hultzen is, but hes another guy that fits the park. Walker+Paxton may never pan out. It remains to be seen. How about Felix? He wouldn't decline significantly but would probably start looking more like a top 15 guy.
Our ERA+ is 89 despite great D and speedy OF in a park where flyballs hang. What happens to that pitching staff when you move the fences in?