How Much Did Estuary Change For 18/Leia?

updated to 18/leila then replaced the skin.estuary folder with the older skin.estuary folder i used with 17.3 in order to keep all of the custom edits/mods i made, everything seemed to go fine, all of the edits/mods are fine and working, as is 18/leila as far as i can tell, but the log file complains about estuary incompatibility as follows:

Code:
08:46:57.892 T:28332  NOTICE: ADDON: skin.estuary version 1.9.10 is incompatible
08:46:57.892 T:28332 WARNING: ADDON: failed to unset skin.estuary
08:46:57.894 T:29828  NOTICE:   load skin from: D:\Media\Kodi\addons\skin.estuary (version: 1.9.10)

so i edited the estuary addon.xml file to reflect the new estuary version and gui and now the log file no longer mentions the incompatibility or failure to “unset”.

Code:
<addon id="skin.estuary" version="2.0.1" name="Estuary" provider-name="phil65, Ichabod Fletchman">
    <requires>
<import addon="xbmc.gui" version="5.13.0"/>
    </requires>

so am i missing out on new estuary 2.0.1 features because i’m using an older estuary version? should i have instead left the updated estuary version alone and created an estuary addon in the appdata folder?