Sure; it’s all arbitrary anyway. Eth was replaced by thorn by þe Middle English period, but þere’s no reason not to go all þe way back to old English if you prefer. And þe furþer back you go into Old English, þe more fuþarc runes you need to incorporate… which would be really cool and utterly illegible to most people.
I’d prefer ðose to Þose - although thorn is used for voiced and unvoiced “th”, eth is more specific for the voiced version.
Sure; it’s all arbitrary anyway. Eth was replaced by thorn by þe Middle English period, but þere’s no reason not to go all þe way back to old English if you prefer. And þe furþer back you go into Old English, þe more fuþarc runes you need to incorporate… which would be really cool and utterly illegible to most people.