I think you can't avoid that.
We have quite a lot of experience with Paypal, their blocks, and request. If you have a new PP account, the limitations is the thing to expect. The annoying part is that you can’t prepare for this. You can’t submit your business documents or provide the description of your business model before they actually block you.
The first time they blocked us was when we received our first ~ 15K in sales. They asked us to provide all the standard business information (Company Registration Documents, Address Proof, etc.) We did that and they informed us that the funds will be released only after all our products are delivered. And to prove it, we had to submit thousands of tracking numbers to PayPal and assign them to each order separately + manually :) I bet they never took a look at them, but after a month or so we received a call that we can use half of the incoming money and the other half will be put in the rolling balance.
During that period, they probably tried to monitor the refunds rate and see if this is some kind of fraud or just a regular dropshipping business. We started rolling again, we even received a better Paypal fee and after some time a Paypal manager. They did know that we were doing dropshipping business, they did know that we had quite a few claims for refunds, but that wasn’t a problem.
The second account we opened for our other company went through a very similar, but slightly different scenario. We got a better offer in the beginning. We were already dropshipping for like 12 months and they allowed us to use 70% of all incoming transactions but we had to put 10K in a fixed reserve which we haven't withdrawn till now.
I think that this is a regular risk management procedure everyone goes through and you can't really avoid it. Depending on your refunds rate, your country, your sales volumes, the person investigating your case the limitations might be different, but if you do everything according to the rules, there’s nothing they can do.
However, if you try to look for workarounds and try to avoid it by opening new accounts, using different names or something like that, you’ll definitely have problems. They’ve invented fraud protection software that has been later used by the US government. They are not the people you can trick that easily :)
So again, I suggest you just try to go through all the standard procedures, build trust, and grow your businesses more modestly but thinking long term.
P.S. One trick: Always contact PayPal by phone after you submit any documents. They'll review them more quickly.