Short articles, prevailing on the channel, can be a good choice for '123 Wallpapers' if they’re going to gain their audience’s sympathy with brevity.
Advanced readability level of '123 Wallpapers' content is probably targeted at well-educated subscribers as not all readers might clearly understand their texts. There are also some articles with medium readability level.
Neutral sentiment normally indicates an unbiased attitude that prevails in the channel’s articles (e.g. it may include some kind of scientific or professional materials).