Anyone doubting the wisdom of bringing stuff from Goodison to the dock stadium should read all about how other club's fans craved for such 'furniture' to be moved to their new stadiums: the City and Arsenal supporters found the move to new surroundings very disorienting in their first few seasons. The Arsenal fans were helped by the clock at the Clock End being brought to the Emirates - part of an 'Arsenalisation' process at the new stadium.
When fans move stadiums there's a rupturing that takes place and the taking of familiar furniture like statues and the like are a way of making that rupture less painful in the initial transfer years.
This alienation is a real thing and we should anticipate it happening to Evertonians at the new stadium. We're no different to other fans that make this move. To leave behind the Holy Trinity and Dean statues is purblind. We need to establish quickly a sense of place at the dock stadium, so bringing stuff like this with us - and more besides - can help in that respect.
This is a decent - not overly academic - article that underlines all this.