No, you have to have APs range overlap in order to maintain clients' connection. About -60dBm/-65dBm should be good enough for roaming, different manufacturers have slightly different recommendations. AiMesh is not perfect and was introduced way before it was ready, but now it supports 802.11k/v with /r in the works, including upcoming (hopefully) Guest Network functionality between nodes. Information as per
@RMerlin and he knows better than anyone else on this forum what is going on in ASUS kitchen. So the development is moving in the right direction.
I have to admit one thing - AiMesh is an excellent marketing strategy how to sell a second (or even third) ASUS router to customers who already have one ASUS router. ASUS Lyra was not very successful on the market and other manufacturers picked-up speed very quickly with multiple home mesh solutions. AiMesh is something that may literally save the business for ASUS. And I really hope they manage to make it work properly, because a software solution using existing hardware will benefit both ASUS and the customers. It doesn't matter if it's real mesh technology or centralized management of APs. What matters is how it works in real life and if it's comparable to what is available from competitors.
Yes, better technologies and implementation do exist in prosumer and business segment, but the price is a big factor on consumer market. Not every home customer is ready to spend >$600 for UniFi, Omada, Aironet, etc... and this is the cost to start only. If you need
@Smokindog more control, options are always available. Just bring your wallet. The ability to extend an existing network by purchasing <$100 RT-AC66U B1 router is tempting. The price of this router is comparable to the price of common good quality AC WiFi extenders and it integrates to the existing setup better, even if it does exactly the same thing.
I did say in another thread that I do not recommend ASUS routers anymore. I have my own reasons for that. In case someone wants to build a new mesh system, there are better options IMHO, both hardware and software. In case someone already has an ASUS router though (AiMesh compatible), I'm not going to tell the guy to throw it away and start over. AiMesh was bad at introduction and still has issues, but I see development going on and improvement. As a technical person I have to give ASUS credit for that. This technology is competing with ASUS own mesh systems and will probably kill Lyra completely, so I'm pretty sure they will do the necessary to make it work right. The sooner, the better for them.