I agree he is an inside mid (and not much else). Problem is we don't need an inside mid that can't kick well enough. DE is a BS stat. It doesn't measure dinky little kicks and handballs in perspective and it doesn't measure a pass that stops a players momentum as a turnover when the recipient turns it over under pressure.Went at 71% DE last season (just for comparison to someone around the same mark, Steele went at 72% in 2017). He's not as bad as what you think.
Regardless, Adams is there predominantly as an inside mid to extract the pill rather than be heavily reliant on his field kicking. He's invaluable when he's at his best. Shouldn't be played in the backline though.
I'd rather have De Goey in the guts with Pendlebury, Sidebottom & Treloar when Elliot & Fasolo come back into the forward line. m Stevenson will ultimately play in the middle as well.