I understand the point of your suggestion, FedeH, but it doesn't convince me completely.
First of all, as you wrote yourself, Lothlórien already has multiple healing features as its own game mechanics, and adding another one might likely end up being too redundant and quite unnecessary (if not inappropriate for balance-related reasons).
It's true, the healing properties of Radagast and, in particular, Eärendil's Enchanted Ship (Vingilótë or Vingilot) can't obviously be used in the early phase. The faction, thus, is exactly provided with the very useful
Safe Refuge, which grants a total coverage in your castle, and the healing effects of the Wine Cellars too (speaking about Mirkwood). In addition to that, I would really like to address another fundamental aspect that you seemed to have left out of your reasoning (I think): Lothlórien's Border Guards and Galadhrim are already endowed with additional healing enhancements via the significant
Lembas Bread passive feature, which exactly allows them to recover while they are inactive (or, in this case, covered by the sacred Mist). Of course, this option is available once you level up, but it's undoubtedly more advantageous than the sole banner carrier alone.
Furthermore, may I also deal with another important lore-based aspect referred to the said spell. I too think that
Mist of the Golden Wood (by the way, the previous title of the spell was changed as I proposed the current more lore accurate name) could be made slightly more valuable. For example, Tolkien wrote that Galadriel sent once a magical mist to protect Eorl (the ancestor of the Rohirrim) from the shadows of Dol Guldur, centuries before the actual War of the Ring; therefore, we could focus on the protective/defensive nature of the Mist of the Golden Wood and think about some suitable defensive bonuses that the spell could additionally offer. This is nonetheless my own personal opinion, and there definitely are other priorities at the moment. Nevertheless, if someone has something to propose, I am more than interested to know other people's thoughts
