The bigger deal, I think, is WOTC adding arbitration to settle disputes into the license. Arbitration almost always favors their client (in this case WOTC) and can be used in
any lawsuit between the company with the TOS and a client who accepts it. In one recent case, someone died at one of the Disney resorts and Disney claimed it had to go through arbitration because the victim had signed up to Disney +. That ended up changing but not due to legal issues but to PR issues when that came to light.
IANAL and I don't know the full details of the arbitration clause in the DDB TOS but it might be used in a dispute, for example, between a publisher and WOTC if the publisher had signed up for a D&D Beyond account. That could get pretty nasty I think.
You can read it here:
www.dndbeyond.com
Section 19 and 20. You can opt out of this 30 days after you agree to it.
IANAL and I don't have the specific details but that might be an issue with the recent license update.