Worries about small squad and even smaller first team?

[I am invisible]

There's nothing to worry about here, IMO - it's mostly down to Tomiyasu's absence and the knock-on effect it is causing.

With our best XI available, what happens is Tomi stays more defensive on the right which allows KT to play more advanced in support of the left forward, who almost becomes the main striker, and our 5 lanes of attack(from left to right) become: KT - Martinelli - Laca - Ødegaard - Saka). At the back, Tomiyasu also provides an additional bodyguard for White, which allows White to take the ball for a walk, knowing he's well-covered on his left and right, if a pass isn't on.

What's happening with Tomi out is that Cedric has had to become the attacking fullback (because he can't defend) and Tierney has had to become the fullback that stays back and balances the side. This then has the knock-on effects of him not being able to support Martinelli as effectively, and White not having that additional minder to his right, which is probably putting him in two minds about when it's safe to step out. (It's also that our 5 lanes of attack, again from left to right, are Martinelli - Lacazette - Ødegaard - Saka - Cedric, so Martinelli is now getting more involved in build up and wing-play, and Saka has become the main goal threat, as shown by his recent increase in goals).

I don't know if you listen to the ArsenalVision podcast at all - if not then I can't recommend it highly enough - but Clive Palmer explains it better than I ever could in this weeks ep.

None of it is a huge problem, though - we're just having to make some adjustments while Tomi is out that mean we're having to muddle through at maybe 70-80% of our best for the time being. We're still winning games, and because of these changes we haven't noticed much of a drop off in our attacking game - it's mostly being felt at the back where KT isn't 100% suited to the more defensive role (although he's still better suited than Cedric), and where we've had to sacrifice some of White's progressive play. It's not a big deal though - just a handful of players being asked to take one for the team and perform slightly unfamiliar jobs for a while, and once you understand that you start to see that there's no serious problems there.