To start, the Twins have played a decent schedule so far, going up against 5 teams widely considered playoff teams (or at least strong playoff contenders) in their first 29 games--4 against SEA, 2 against LAD, 4 against BOS, 3 against CWS, and 3 against TBR--16 games total. Granted, Seattle and Boston both look weaker than expected, but there's still plenty of talent on both of those teams, and the Twins split against them. The real question is how much stock to put into the 2 non-competitive losses against LAD, as opposed to the 5-1 record against Tampa and Chicago.
As far as needs, for me the biggest is actually a starting pitcher at least as good as Sonny Gray. There's no way Ryan, Ober, and Winder can pitch at current rates for the entire year, and still be effective in October, so unless the Twins want Archer or Bundy to be the inning eater that lets you skip those 3 a couple times in the second half, you'll need someone else. This of course also assumes that Paddack can return in short order and be effective, and that there are no other injuries, so at least a #2, and ideally a #1 (if the Twins want to actually make noise in October, not just participate). The names potentially in play here are Kelly from ARI, Zimmerman from BAL (would require a lot, as he only has 1 year of service time), Montas from OAK, Mahle from CIN, and Kuhl from COL. Kuhl should be pretty gettable, as he is a FA at the end of the year. I don't think any of those profile as a sure #1.
Next on my list for needs is a bullpen Alpha that can be your traditional closer, and take the 9th anytime you have a lead. This would allow Duran, Smith, and (hopefully) Duffey/Pagan/Alcala/Coulombe to be deployed in spots where they'd be most effective, and then use Jax as a multi-inning guy to get you through the 5th and 6th or 6th and 7th.
Finally, it's possible another bat might be needed, but I want to hold on that, to see if Miranda, Larnach, Lewis, and/or Kiriloff can be contributors. If 2 of those can become impact bats, adding that to an Arraez/Buxton/Correa/Polanco top 4 gives you a good enough lineup, in my opinion. If more than 2 materialize this year, we're in good shape with Jeffers/Kepler as our wrost bats.
When I look at all this, my thought is to wonder if this is the year to make moves. When considering that our starting staff next year shapes up to be Gray, Maeda, Paddack, Ryan, Ober, and Winder, with hopefully Balazovic, SWR, Varland, and Canterino ready to fill in, and those 10 guys would cost maybe $30M, next year seems to be the year you can really have some ability to do things, especially if Miranda, Laranch, Lewis, and Kiriloff establish themselves in the lineup. Because of that, I think this is the year to stand pat and let the teams gel, unless you're able to swing a deal that is too good to pass up (say Montas for Canterino and CES for example, or Josh Bell for Cavaco perhaps).