As regards to "shall issue" vs "may issue", there is a small ambiguity but "shall issue" is more likely. One paragraph in its legacy language states:
(a) An individual who is a citizen of the State of Delaware of full age and good moral citizenship and who is not a person prohibited as described in § 1448 of this title desiring to be licensed to carry a concealed deadly weapon for personal protection or the protection of the individual’s family, business, or property may be licensed to do so when the following conditions have been strictly complied with:
In a new paragraph, it states:
(b) The Executive Director shall conduct such inquiries and investigations as may be required by law to ensure that all applicants for a concealed carry license and concealed carry licensees are fully qualified to be and remain licensed under § 1441 of Title 11 and this chapter.
(c) Upon determining that an applicant is fully qualified for a concealed carry license, the Commission shall cause a concealed carry license to be sent to the licensee by mail.