✅ No, we couldn't find information specifically about Arsenal exploring an alternative to Eberechi Eze and being warned it might be a mistake from major news outlets. Instead, the most prevalent and authoritative reports focus on Arsenal agreeing a deal or nearing a deal to sign Eberechi Eze from Crystal Palace for around £55 million.

These include:

1. https://www.fourfourtwo.com/news/arsenal-transfer-news-agree-deal-for-eberechi-eze-report-crystal-palace-signings-rumours-gossip-paper-talk-afc - (Trust Score 8/10)

- Reports Arsenal have agreed financial terms with Crystal Palace for Eze, emphasizing the future role he might play in their squad.

2. https://www.teamtalk.com/arsenal/eberechi-eze-arsenal-crystal-palace-deal-agreed - (Trust Score 7/10)

- Confirms Arsenal's agreement on a £55 million fee with Palace, mentioning the delay due to Palace needing a replacement and Eze's excitement for the move.

3. https://www.givemesport.com/arsenal-crystal-palace-agree-eberechi-eze-transfer/ - (Trust Score 7/10)

- Reiterates the agreement and views Eze as a strong addition for Arsenal, focusing on the financial details and the transfer progress.

No sources from major outlets or those with high trust scores explicitly mention Arsenal exploring an alternative to Eze or warnings that it might be a mistake. The available credible sources mainly highlight Arsenal's commitment to the Eze signing.